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original article |
Date |
Title |
Authors All Authors |
| 1 |
[GO] |
2023―Mar―21 |
Statistical analysis of the impacts of COVID-19 pandemic on the small and large-scale tourism sectors in developing countries |
Pranjal Kumar, Pratima Ekka |
| 2 |
[GO] |
2023―Mar―18 |
COVID-19, travel restrictions and environmental consequences |
Muhammad Usman, Li Yuyan, Mudassir Husnain, Muhammad Waheed Akhtar |
| 3 |
[GO] |
2023―Mar―01 |
The positive impact of the Omicron pandemic lockdown on air quality and human health in cities around Shanghai |
Yu Wang, Qingqing Ge |
| 4 |
[GO] |
2023―Feb―23 |
Optimization of food-energy-water-waste nexus in a sustainable food supply chain under the COVID-19 pandemic: a case study in Iran |
Marziye Seif, Saeed Yaghoubi, Mohammad Reza Khodoomi |
| 5 |
[GO] |
2023―Feb―22 |
Econometric and stochastic analysis of stock price before and during COVID-19 in India |
Madhavan Madheswaran, Kasilingam Lingaraja, Pandiaraja Duraisamy |
| 6 |
[GO] |
2023―Feb―17 |
Impacts of travel bans and travel intention changes on aviation emissions due to Covid-19 pandemic |
Ö. Zeydan, İ. Zeydan |
| 7 |
[GO] |
2023―Feb―08 |
Nitrogen dioxide as proxy indicator of air pollution from fossil fuel burning in New Delhi during lockdown phases of COVID-19 pandemic period: impact on weather as revealed by Sentinel-5 precursor (5p) spectrometer sensor |
Pavan Kumar, Prashant Kumar Srivastava, Manish Kumar Pandey, Akash Anand, Jayanta Kumar Biswas, Martin Drews, et al. (+7) Manmohan Dobriyal, Ram Kumar Singh, Manuel De la Sen, Sati Shankar Singh, Ajai Kumar Pandey, Manoj Kumar, Meenu Rani |
| 8 |
[GO] |
2023―Jan―25 |
COVID-19 response in Africa: impacts and lessons for environmental management and climate change adaptation |
Victor Ongoma, Terence Epule Epule, Youssef Brouziyne, Meryem Tanarhte, Abdelghani Chehbouni |
| 9 |
[GO] |
2022―Dec―08 |
Blood plasma supply chain planning to respond COVID-19 pandemic: a case study |
Ali Fallahi, Seyed Alireza Mousavian Anaraki, Hadi Mokhtari, Seyed Taghi Akhavan Niaki |
| 10 |
[GO] |
2022―Dec―06 |
How does risk perception of the COVID-19 pandemic affect the consumption behavior of green food? |
Houjian Li, Andi Cao, Si Chen, Lili Guo |
| 11 |
[GO] |
2022―Dec―02 |
The regulatory role of sustainable product design media and environmental performance in the impact of the Covid-19 epidemic on corporate sustainability: an application in Turkey |
Yakup Durmaz, Ahmet Fidanoğlu |
| 12 |
[GO] |
2022―Nov―24 |
How can community support be maintained during the COVID-19 pandemic? |
Eunmie Jang, Duk-Byeong Park |
| 13 |
[GO] |
2022―Nov―09 |
Link between structural risk factors for adverse impacts of COVID-19 and food insecurity in developed and developing countries |
Luisa Marti, Rosa Puertas |
| 14 |
[GO] |
2022―Nov―03 |
A district-level vulnerability assessment of next COVID-19 variant (Omicron BA.2) in Uttarakhand using quantitative SWOT analysis |
Zainab Khan, Sk Ajim Ali, Mohd Mohsin, Farhana Parvin, Syed Kausar Shamim, Ateeque Ahmad |
| 15 |
[GO] |
2022―Sep―17 |
A systematic approach for assessing water, energy and food security during the COVID-19 pandemic: case study of Mexico |
Alma Yunuen Raya-Tapia, Brenda Cansino-Loeza, Xate Geraldine Sánchez-Zarco, César Ramírez-Márquez, José María Ponce-Ortega |
| 16 |
[GO] |
2022―Sep―01 |
Mediation effect of diversity and availability of high transit service on transit oriented development and spread of COVID-19 |
Rupali Khare, Vasanta Govind Kumar Villuri, Satish Kumar, Devarshi Chaurasia |
| 17 |
[GO] |
2022―Aug―30 |
Understanding the COVID-19 pandemic prevalence in Africa through optimal feature selection and clustering: evidence from a statistical perspective |
Mohamed Lamine Sidibé, Roland Yonaba, Fowé Tazen, Héla Karoui, Ousmane Koanda, Babacar Lèye, et al. (+2) Harinaivo Anderson Andrianisa, Harouna Karambiri |
| 18 |
[GO] |
2022―Aug―18 |
Design and optimization of a sustainable and resilient mask supply chain during the COVID-19 pandemic: a multi-objective approach |
Milad Alizadeh-Meghrazi, Babak Mohamadpour Tosarkani, Saman Hassanzadeh Amin, Milos R Popovic, Payman Ahi |
| 19 |
[GO] |
2022―Aug―16 |
A sustainable advanced artificial intelligence-based framework for analysis of COVID-19 spread |
Misbah Ahmad, Imran Ahmed, Gwanggil Jeon |
| 20 |
[GO] |
2022―Aug―12 |
Impact of air pollutants on COVID-19 transmission: a study over different metropolitan cities in India |
Souvik Manik, Manoj Mandal, Sabyasachi Pal |
| 21 |
[GO] |
2022―Jul―19 |
Climate change analysis in energy-mix with non-carbon emission energy incorporated with pandemic society |
Tae Ho Woo |
| 22 |
[GO] |
2022―Jul―14 |
Interval-valued intuitionistic fuzzy digraph-matrix approach with PERMAN algorithm for measuring COVID-19 impact on perishable food supply chain |
Hritika Sharma, Saket Shanker, Akhilesh Barve, Kamalakanta Muduli, Anil Kumar, Sunil Luthra |
| 23 |
[GO] |
2022―Jun―30 |
Carbon footprint changing with Covid-19 in Turkey |
Alper Uzunali, Tuğçe Yazıcı |
| 24 |
[GO] |
2022―Jun―04 |
From adoration to damnation? Exploring role of media in shaping low-carbon economy in times of the COVID-19 pandemic |
Justyna Chodkowska-Miszczuk, Tomasz Starczewski, Krzysztof Rogatka, Aleksandra Lewandowska, Stanislav Martinat |
| 25 |
[GO] |
2022―Jun―01 |
Correction: COVID-19 and transportation of India: influence on infection risk and greenhouse gas emissions |
Arti Roshan Soni, Kumar Amrit, Amar Mohan Shinde |
| 26 |
[GO] |
2022―May―11 |
Life cycle assessment and circularity evaluation of the non-medical masks in the Covid-19 pandemic: a Brazilian case |
Marcell Mariano Corrêa Maceno, Samuel João, Danielle Raphaela Voltolini, Izabel Cristina Zattar |
| 27 |
[GO] |
2022―May―09 |
COVID-19 and transportation of India: influence on infection risk and greenhouse gas emissions |
Arti Roshan Soni, Kumar Amrit, Amar Mohan Shinde |
| 28 |
[GO] |
2022―Apr―25 |
Diverse spillover effects of COVID-19 control measures on air quality improvement: evidence from typical Chinese cities |
Laijun Zhao, Yu Wang, Honghao Zhang, Ying Qian, Pingle Yang, Lixin Zhou |
| 29 |
[GO] |
2022―Apr―07 |
Resource management: ways to sustain the environmental gains of COVID-19 lockdown |
S. Mary Celin, Pallvi Bhanot, Anchita Kalsi |
| 30 |
[GO] |
2022―Apr―07 |
From scenario to mounting risks: COVID-19’s perils for development and supply security in the Sahel |
Mohammad Al-Saidi, Suhair A. Gayoum Saad, Nadir Ahmed Elagib |
| 31 |
[GO] |
2022―Mar―20 |
Analyzing and visualizing global research trends on COVID-19 linked to sustainable development goals |
Shaher H. Zyoud |
| 32 |
[GO] |
2022―Feb―25 |
COVID-19 and household water insecurities in vulnerable communities in the Mekong Region |
Louis Lebel, Hap Navy, Phoummixay Siharath, Chau Thi Minh Long, Nilar Aung, Phimphakan Lebel, et al. (+2) Chu Thai Hoanh, Boripat Lebel |
| 33 |
[GO] |
2022―Jan―17 |
COVID-19 restrictions and greenhouse gas savings in selected Islamic and MENA countries: An environmental input-output approach for climate policies |
Mahdi Ghaemi Asl, Sajad Rajabi, Muhammad Irfan, Reza Ranjbaran, Mohammad Ghasemi Doudkanlou |
| 34 |
[GO] |
2022―Jan―13 |
Gender attitude towards environmental protection: a comparative survey during COVID-19 lockdown situation |
S. A. Dhenge, S. N. Ghadge, M. C. Ahire, S. D. Gorantiwar, M. G. Shinde |
| 35 |
[GO] |
2022―Jan―04 |
Energy access during and post-COVID-19 pandemic in sub-Saharan countries: the case of Ethiopia |
Yohannes Biru Aemro, Pedro Moura, Aníbal T. de Almeida |
| 36 |
[GO] |
2021―Oct―11 |
Metals in the soil of urban cemeteries in Carazinho (South Brazil) in view of the increase in deaths from COVID-19: projects for cemeteries to mitigate environmental impacts |
Alcindo Neckel, Cleiton Korcelski, Luis F. O. Silva, Henrique Aniceto Kujawa, Brian William Bodah, Adriano Marcos Rodrigues Figueiredo, et al. (+4) Laércio Stolfo Maculan, Affonso Celso Gonçalves, Eliane Thaines Bodah, Leila Dal Moro |
| 37 |
[GO] |
2021―Sep―23 |
Climate indicators and COVID-19 recovery: A case of Wuhan during the lockdown |
Zhai Shuai, Najaf Iqbal, Rai Imtiaz Hussain, Farrukh Shahzad, Yong Yan, Zeeshan Fareed |
| 38 |
[GO] |
2021―Sep―16 |
The impact of COVID-19 on business perspectives of sustainable development and corporate social responsibility in China |
Dongyong Zhang, Shuhui Lu, Stephen Morse, Lingyi Liu |
| 39 |
[GO] |
2021―Sep―15 |
Shock effect of COVID-19 infection on environmental quality and economic development in China: causal linkages (Health Economic Evaluation) |
Shengxia Xu, Qiang Liu, Xiaoli Lu |
| 40 |
[GO] |
2021―Sep―01 |
Changes occurring in consumption habits of people during COVID-19 pandemic and the water footprint |
Emine Elmaslar Özbaş, Özcan Akın, Sinan Güneysu, H. Kurtuluş Özcan, Atakan Öngen |
| 41 |
[GO] |
2021―Aug―29 |
Tourism governance during the COVID-19 pandemic crisis: A proposal for a sustainable model to restore the tourism industry |
Rafael Robina-Ramírez, Marcelo Sánchez-Oro Sánchez, Héctor Valentín Jiménez-Naranjo, José Castro-Serrano |
| 42 |
[GO] |
2021―Aug―10 |
Determination of vulnerable regions of SARS-CoV-2 in Malaysia using meteorology and air quality data |
Prasanna Mohan Viswanathan, Chidambaram Sabarathinam, Shankar Karuppannan, Gnanachandrasamy Gopalakrishnan |
| 43 |
[GO] |
2021―Apr―23 |
Short-term impacts of air pollutants in three megacities of India during COVID-19 lockdown |
Rajiv Ganguly, Divyansh Sharma, Prashant Kumar |
| 44 |
[GO] |
2021―Apr―16 |
Investigation of the urbanization contribution to the COVID-19 outbreak in Iran and the MECA countries |
Nikta Bahman Bijari, Mohammad Hadi Mahdinia, Mohammad Reza Mansouri Daneshvar |
| 45 |
[GO] |
2021―Apr―03 |
An in silico approach to target RNA-dependent RNA polymerase of COVID-19 with naturally occurring phytochemicals |
Hafiza Salaha Mahrosh, Ghulam Mustafa |
| 46 |
[GO] |
2021―Apr―03 |
Strong link between coronavirus count and bad air: a case study of India |
Sneha Gautam, Cyril Samuel, Alok Sagar Gautam, Sanjeev Kumar |
| 47 |
[GO] |
2021―Mar―24 |
How Covid-19 pandemic and partial lockdown decisions affect air quality of a city? The case of Istanbul, Turkey |
Erkan Celik, Muhammet Gul |
| 48 |
[GO] |
2021―Mar―24 |
Modeling the relationship between carbon emissions and environmental sustainability during COVID-19: a new evidence from asymmetric ARDL cointegration approach |
Muddassar Sarfraz, Muhammad Mohsin, Sobia Naseem, Amit Kumar |
| 49 |
[GO] |
2021―Feb―04 |
Positive environmental effects of the coronavirus 2020 episode: a review |
Milad Mousazadeh, Biswaranjan Paital, Zohreh Naghdali, Zohreh Mortezania, Marjan Hashemi, Elnaz Karamati Niaragh, et al. (+6) Mohammad Aghababaei, Melika Ghorbankhani, Eric Lichtfouse, Mika Sillanpää, Khalid S. Hashim, Mohammad Mahdi Emamjomeh |
| 50 |
[GO] |
2021―Jan―31 |
The COVID-19 puzzle: a global nightmare |
Hafiza Salaha Mahrosh, Ghulam Mustafa |
| 51 |
[GO] |
2021―Jan―29 |
Spatiotemporal dynamics of temperature and precipitation with reference to COVID-19 pandemic lockdown: perspective from Indian subcontinent |
Soumita Sengupta, Sk. Mohinuddin, Mohammad Arif |
| 52 |
[GO] |
2021―Jan―22 |
Organizational resilience and social-economic sustainability: COVID-19 perspective |
Siddharth Shankar Rai, Shivam Rai, Nitin Kumar Singh |
| 53 |
[GO] |
2021―Jan―19 |
Maintaining efficient logistics and supply chain management operations during and after coronavirus (COVID-19) pandemic: learning from the past experiences |
Ubaid Illahi, Mohammad Shafi Mir |
| 54 |
[GO] |
2021―Jan―06 |
Effects of COVID-19 lockdown phases in India: an atmospheric perspective |
Pramod Soni |
| 55 |
[GO] |
2021―Jan―06 |
COVID-19: the impact of a global crisis on sustainable development teaching |
Walter Leal Filho, Elizabeth Price, Tony Wall, Chris Shiel, Ulisses M. Azeiteiro, Mark Mifsud, et al. (+11) Luciana Brandli, Carla Sofia Farinha, Sandra Caeiro, Amanda Lange Salvia, Claudio Ruy Vasconcelos, Luiza Olim de Sousa, Paul Pace, Federica Doni, Lucas Veiga Avila, Bárbara Fritzen, Todd Jared LeVasseur |
| 56 |
[GO] |
2021―Jan―04 |
Cleaning the river Damodar (India): impact of COVID-19 lockdown on water quality and future rejuvenation strategies |
Baisakhi Chakraborty, Sambhunath Roy, Amit Bera, Partha Pratim Adhikary, Biswajit Bera, Debashish Sengupta, et al. (+2) Gouri Sankar Bhunia, Pravat Kumar Shit |
| 57 |
[GO] |
2021―Jan―04 |
Design of a point-of-care facility for diagnosis of COVID-19 using an off-grid photovoltaic system |
Jean Poll Alva-Araujo, Oscar Escalante-Maldonado, Ruddy Alfredo Cabrejos Ramos |
| 58 |
[GO] |
2021―Jan―04 |
COVID-19: Has social isolation reduced the emission of pollutants in the megacity of São Paulo-Brazil? |
Lumy Noda, Ana Beatriz E. Q. Nóbrega, João B. M. da Silva Júnior, Flávio Schmidlin, Lucila Labaki |
| 59 |
[GO] |
2021―Jan―03 |
COVID-19 lockdowns reduce the Black carbon and polycyclic aromatic hydrocarbons of the Asian atmosphere: source apportionment and health hazard evaluation |
Balram Ambade, Tapan Kumar Sankar, Amit Kumar, Alok Sagar Gautam, Sneha Gautam |
| 60 |
[GO] |
2021―Jan―02 |
Water, sanitation, hygiene and waste disposal practices as COVID-19 response strategy: insights from Bangladesh |
S. M. Didar-Ul Islam, Prantor Kumar Mondal, Nathanael Ojong, Md. Bodrud-Doza, Md. Abu Bakar Siddique, Moazzem Hossain, Mohammed A. Mamun |
| 61 |
[GO] |
2020―Dec―04 |
Correction to: The consequences of coronavirus outbreak on commodity markets |
Himadri Rajput, Rahil Changotra, Prachi Rajput, Sneha Gautam, Anjani R. K. Gollakota, Amarpreet Singh Arora |
| 62 |
[GO] |
2020―Oct―30 |
Nexus between population density and novel coronavirus (COVID-19) pandemic in the south Indian states: A geo-statistical approach |
Mohammad Arif, Soumita Sengupta |
| 63 |
[GO] |
2020―Oct―22 |
Improvement in ambient-air-quality reduced temperature during the COVID-19 lockdown period in India |
Subodh Chandra Pal, Indrajit Chowdhuri, Asish Saha, Rabin Chakrabortty, Paramita Roy, Manoranjan Ghosh, Manisa Shit |
| 64 |
[GO] |
2020―Oct―11 |
Time-frequency co-movement between COVID-19, crude oil prices, and atmospheric CO2 emissions: Fresh global insights from partial and multiple coherence approach |
Yasir Habib, Enjun Xia, Zeeshan Fareed, Shujahat Haider Hashmi |
| 65 |
[GO] |
2020―Oct―09 |
COVID-19 Creating another problem? Sustainable solution for PPE disposal through LCA approach |
Harender Kumar, Amaanuddin Azad, Ankit Gupta, Jitendra Sharma, Hemant Bherwani, Nitin Kumar Labhsetwar, Rakesh Kumar |
| 66 |
[GO] |
2020―Oct―08 |
Effect of meteorological factors on COVID-19 cases in Bangladesh |
Abu Reza Md. Towfiqul Islam, Md. Hasanuzzaman, Md. Abul Kalam Azad, Roquia Salam, Farzana Zannat Toshi, Md. Sanjid Islam Khan, et al. (+2) G. M. Monirul Alam, Sobhy M. Ibrahim |
| 67 |
[GO] |
2020―Oct―08 |
The nCOVID-19 and financial stress in the USA: health is wealth |
Andrew Adewale Alola, Uju Violet Alola, Samuel Asumadu Sarkodie |
| 68 |
[GO] |
2020―Oct―07 |
Association between climatic variables and COVID-19 pandemic in National Capital Territory of Delhi, India |
Omvir Singh, Pankaj Bhardwaj, Dinesh Kumar |
| 69 |
[GO] |
2020―Oct―06 |
A global analysis on the effect of temperature, socio-economic and environmental factors on the spread and mortality rate of the COVID-19 pandemic |
Mizanur Rahman, Mahmuda Islam, Mehedi Hasan Shimanto, Jannatul Ferdous, Abdullah Al-Nur Shanto Rahman, Pabitra Singha Sagor, Tahasina Chowdhury |
| 70 |
[GO] |
2020―Oct―06 |
Coronavirus disease-19 in environmental fields: a bibliometric and visualization mapping analysis |
Shaher H. Zyoud, Ahed H. Zyoud |
| 71 |
[GO] |
2020―Oct―01 |
COVID-19 lockdown: animal life, ecosystem and atmospheric environment |
Harekrishna Bar |
| 72 |
[GO] |
2020―Sep―25 |
Statistical interpretation of environmental influencing parameters on COVID-19 during the lockdown in Delhi, India |
Amit Awasthi, Aditi Sharma, Prabhjot Kaur, Balakrishnaiah Gugamsetty, Akshay Kumar |
| 73 |
[GO] |
2020―Sep―24 |
Temporary reduction in air pollution due to anthropogenic activity switch-off during COVID-19 lockdown in northern parts of India |
Alok Sagar Gautam, Nikhilesh Kumar Dilwaliya, Ayushi Srivastava, Sanjeev Kumar, Kuldeep Bauddh, Devendraa Siingh, et al. (+3) M. A. Shah, Karan Singh, Sneha Gautam |
| 74 |
[GO] |
2020―Sep―22 |
Assessing the immediate impact of COVID-19 lockdown on the air quality of Kolkata and Howrah, West Bengal, India |
Mohan Sarkar, Anupam Das, Sutapa Mukhopadhyay |
| 75 |
[GO] |
2020―Sep―18 |
Double-hit scenario of Covid-19 and global value chains |
Muhammad Zeshan |
| 76 |
[GO] |
2020―Aug―31 |
Largest democracy in the world crippled by COVID-19: current perspective and experience from India |
Rahil Changotra, Himadri Rajput, Prachi Rajput, Sneha Gautam, Amarpreet Singh Arora |
| 77 |
[GO] |
2020―Aug―26 |
Impact of COVID-19 pandemic on waste management |
Samuel Asumadu Sarkodie, Phebe Asantewaa Owusu |
| 78 |
[GO] |
2020―Aug―13 |
Environmental impact of coronavirus (COVID-19) from Turkish perceptive |
Serdar Aydın, Betina Assumpta Nakiyingi, Cengiz Esmen, Sinan Güneysu, Meena Ejjada |
| 79 |
[GO] |
2020―Aug―11 |
A shock like no other: coronavirus rattles commodity markets |
Himadri Rajput, Rahil Changotra, Prachi Rajput, Sneha Gautam, Anjani R. K. Gollakota, Amarpreet Singh Arora |
| 80 |
[GO] |
2020―Aug―08 |
Current perspective of COVID-19 spread across South Korea: exploratory data analysis and containment of the pandemic |
Amarpreet Singh Arora, Himadri Rajput, Rahil Changotra |
| 81 |
[GO] |
2020―Jul―28 |
Significant impacts of COVID-19 lockdown on urban air pollution in Kolkata (India) and amelioration of environmental health |
Biswajit Bera, Sumana Bhattacharjee, Pravat Kumar Shit, Nairita Sengupta, Soumik Saha |
| 82 |
[GO] |
2020―Jul―18 |
Strategic assessment of COVID-19 pandemic in Bangladesh: comparative lockdown scenario analysis, public perception, and management for sustainability |
Mashura Shammi, Md. Bodrud-Doza, Abu Reza Md. Towfiqul Islam, Md. Mostafizur Rahman |
| 83 |
[GO] |
2020―Jul―18 |
Understanding COVID-19 transmission, health impacts and mitigation: timely social distancing is the key |
Satinder Kaur, Hemant Bherwani, Sunil Gulia, Ritesh Vijay, Rakesh Kumar |
| 84 |
[GO] |
2020―Jul―15 |
Air pollution aggravating COVID-19 lethality? Exploration in Asian cities using statistical models |
Ankit Gupta, Hemant Bherwani, Sneha Gautam, Saima Anjum, Kavya Musugu, Narendra Kumar, et al. (+2) Avneesh Anshul, Rakesh Kumar |
| 85 |
[GO] |
2020―Jul―10 |
Coronavirus pandemic versus temperature in the context of Indian subcontinent: a preliminary statistical analysis |
Gowhar Meraj, Majid Farooq, Suraj Kumar Singh, Shakil A. Romshoo, M. S. Nathawat, Shruti Kanga |
| 86 |
[GO] |
2020―Jul―08 |
Understanding COVID-19 transmission through Bayesian probabilistic modeling and GIS-based Voronoi approach: a policy perspective |
Hemant Bherwani, Saima Anjum, Suman Kumar, Sneha Gautam, Ankit Gupta, Himanshu Kumbhare, et al. (+2) Avneesh Anshul, Rakesh Kumar |
| 87 |
[GO] |
2020―Jun―30 |
COVID-19: impact by and on the environment, health and economy |
Sneha Gautam, Luc Hens |
| 88 |
[GO] |
2020―Jun―28 |
Effects of Covid-19 outbreak on environment and renewable energy sector |
Hasan Eroğlu |
| 89 |
[GO] |
2020―Jun―05 |
Global assessment of environment, health and economic impact of the novel coronavirus (COVID-19) |
Samuel Asumadu Sarkodie, Phebe Asantewaa Owusu |
| 90 |
[GO] |
2020―Apr―19 |
COVID-19 virus outbreak lockdown: What impacts on household food wastage? |
Sarra Jribi, Hanen Ben Ismail, Darine Doggui, Hajer Debbabi |
| 91 |
[GO] |
2020―Apr―18 |
SARS-CoV-2 pandemic in India: what might we expect? |
Sneha Gautam, Luc Hens |
| 92 |
[GO] |
2020―Apr―04 |
Global implications of bio-aerosol in pandemic |
Sneha Gautam, Ujwalkumar Trivedi |
