无失效周期寿命检验 (FFPLT)的统计特性及平均无失效时间间隔 (MTBF)的置信限
王庆成
Statistical Properties and Confidence Limits about the Mean Time between the Failures (MTBF) in Failure-free Period Life Test (FFPLT) 
WANG Qing-cheng
数学季刊 . 2001, (1): 9 -19 .