K. V. L. N. Acharyulu, K. Nagamani, I. Rajeswari, S. V. Vasavi, S. Maduri. “A Traditional Series Solution of Epidemic Model (Type-III)”. International Journal of Advanced Science and Technology, Vol. 29, no. 3, Mar. 2020, pp. 15108 -, http://sersc.org/journals/index.php/IJAST/article/view/32249.