1、题目：A reliability-improving graph transformation with applications to network reliability
链接：http://onlinelibrary.wiley.com/doi/10.1002/net.3230220206/abstract
2、Testing for reliability improvement or deterioration in repairable systems
链接：http://onlinelibrary.wiley.com/doi/10.1002/qre.4680080208/abstract
谢谢