The following publications are possibly variants of this publication:
- Redundancy Optimization Problems With Fuzzy Random LifetimesRuiqing Zhao, Kaoping Song, Jianhua Zhu. fuzzIEEE 2001: 288-291
- Redundancy Optimization Problems with Uncertain LifetimesRuiqing Zhao, Wansheng Tang. In Gregory Levitin, editor, Computational Intelligence in Reliability Engineering: Evolutionary Techniques in Reliability Analysis and Optimization. Volume 39 of Studies in Computational Intelligence, pages 329-374, Springer, 2007. [doi]
- Standby Redundancy Optimization with Type-2 Fuzzy LifetimesYanju Chen, Ying Liu. swarm 2011: 329-337 [doi]
- The modes of convergence in the approximation of fuzzy random optimization problemsYan-Kui Liu, Zhi-Qiang Liu, Jinwu Gao. soco, 13(2):117-125, 2009. [doi]