1. Bad-as-old analysis of system failure data;Ascher,1969
2. Repairable systems reliability;Ascher,1981
3. Changes in helicopter reliability/maintainability characteristics over time;Ascher,1975
4. Optimum preventive maintenance policies;Barlow;Operations Research,1960
5. Increasing hazard functions and overhaul policy;Bassin;ARMS, IEEE-69, C8-R,1969