Kishan, Ram, and Manish Kumar. “STOCHASTIC ANALYSIS OF A TWO-UNIT PARALLEL SYSTEM WITH PREVENTIVE MAINTENANCE”. Journal of Reliability and Statistical Studies 2, no. 2 (December 1, 2009): 31–38. Accessed April 29, 2026. https://journals.riverpublishers.com/index.php/JRSS/article/view/22061.