Pandey, S. B. ., S. B. . Singh, and S. . Sharma. “RELIABILITY AND COST ANALYSIS OF A SYSTEM WITH MULTIPLE COMPONENTS USING COPULA”. Journal of Reliability and Statistical Studies, vol. 1, no. 1, Dec. 2008, pp. 25-32, https://journals.riverpublishers.com/index.php/JRSS/article/view/22107.