U.A. Ali; K. Suleiman; B. Yusuf; I. Yusuf; Mean time to system failure and availability modeling of a repairable non identical three unit warm standby redundant system. Nigerian Journal of Basic and Applied Science, 20(4), pp. 315-323(2012).
L.R.Goel; P.Gupta; Stochastic behavior of a two-unit (dissimilar) hot standby system with three modes. Microelectronics reliability, volume-23, issue-6, PP.1035-1040(1983).
P. Gupta;G.Kaur; Reliability and Availability evaluation of a system switched to another similar, substitute or duplicate system on total failure. Journal for innovative research in multidisciplinary field volume - 2, issue - 9, pp. 57- 62(2016).
G. Kaur;P.Vinodiya; Availability improvement in single unit system with two types of repair facilities. Journal for innovative research in multidisciplinary field volume - 2, issue - 12, pp. 421- 425(2016).
G. Kaur;P. Vinodiya;Reliability analysis of a two- non-identical units cold standby repairable system with switching of units by using linear first order differential equations. Journal for innovative research in multidisciplinary field volume - 3, issue - 1, pp. 92- 98(2017).
E.L. Said; M. Kh.; M.S. El-Sherbeny; Evaluation of reliability and availability characteristics of two different systems by using linear first order differential equations. Journal of mathematics and statistics, 1 (2), pp. 119-123(2005).