Kadyan, S. , Malik, S.C. and Gitanjali 2021. Stochastic Analysis of a Three-Unit Non-Identical Repairable System with Simultaneous Working of Cold Standby Units. Journal of Reliability and Statistical Studies. 13, 02 (Jan. 2021), 385–400. DOI:https://doi.org/10.13052/jrss0974-8024.13249.