Analysis of a simple step-stress life test with a random stress-change time.

Chengjie Xiong Kejun Zhu Ming Ji Analysis of a simple step-stress life test with a random stress-change time. 67-74 2006 55 IEEE Transactions on Reliability 1 http://dx.doi.org/10.1109/TR.2005.863801 db/journals/tr/tr55.html#XiongZJ06