1. Shu Z. Analysis and study of machining center failures. Master's Thesis. Jilin University of technology; 1995 (in Chinese).
2. Machining center maintainability research;Shen;China Mech Engng,1998
3. Ma J. The study of machining center reliability. Master's Thesis. Jilin University of technology; 1994 (in Chinese).
4. Probability distribution of machining center failures;Jia;Reliab Engng Syst Safety,1995
5. Statistical models and methods for lifetime data;Lawless,1982