Vivek Gupta, Tripti Sagar, Dr. Chetan Panse. Use of online payment transactions across Tier-1, Tier-2 and Tier-3 cities in India. IJAST [Internet]. 2020Jun.6 [cited 2024Apr.26];29(4s):3274-82. Available from: http://sersc.org/journals/index.php/IJAST/article/view/22720