Gupta, Rakesh, and Vishal Sharma. “A Two Unit Standby System With Preventive Maintenance and Inverse Gaussian Repair Time Distribution”. Journal of Informatics and Mathematical Sciences 2, no. 2 & 3 (December 25, 2010): 183–191. Accessed May 4, 2024. http://www.rgnpublications.com/journals/index.php/jims/article/view/37.