K.Selvavinayagam, V.Jothi Francina, and V.P.Rameshkumaar. “Evaluation of Logistic Performance Index of India in the Indian Postal Services”. International Journal of Engineering and Management Research 8, no. 5 (October 31, 2018): 80–87. Accessed July 3, 2024. https://ijemr.vandanapublications.com/index.php/ijemr/article/view/575.