Dr. P. V. Rajeswari, Dr. P. Pirakatheeswari, Prof. M. Vadivel. “A Study on Customers’ Perception towards Digital Payment System With Special Reference to Coimbatore City”. Annals of the Romanian Society for Cell Biology, vol. 25, no. 2, Mar. 2021, pp. 3542-51, http://annalsofrscb.ro/index.php/journal/article/view/1340.