1. Maintenance excellence optimizing life-cycle decisions;Campbell,2001
2. Maintenance, replacement and reliability;Jardine,1973
3. Duffuaa SB, Dana M, AL-Sultan K, Andiyani A. A simulation model for maintenance systems in Saudi Arabia. Final Report. KACST Project NOAR – 16-85; 2000.
4. Optimal replacements in proportional hazard models;Makis;INFOR,1992
5. Condition-based maintenance: tools and decision making;Tsang;J Qual Maint Eng,1995