Krishnakumar Jayachadran, “The Impact of CRM and eCRM on Customer Retention and Profitability”, Int. J. Comput. Sci. Inf. Technol. Res., vol. 3, no. 1, pp. 29–36, Dec. 2022, Accessed: Dec. 23, 2024. [Online]. Available: https://ijcsitr.com/index.php/home/article/view/IJCSITR_2022_03_01_05