Maiti, S. S. ., M. . Dey, and S. . Sarkar (Mondal). “DISCRETE XGAMMA DISTRIBUTIONS: PROPERTIES, ESTIMATION AND AN APPLICATION TO THE COLLECTIVE RISK MODEL”. Journal of Reliability and Statistical Studies, vol. 11, no. 01, Apr. 2018, pp. 117-32, https://journals.riverpublishers.com/index.php/JRSS/article/view/20913.