REFERENCES
- Kuznecov , V.N. , Turbin , A.F. and Caturan , G.G. 1981 . Semi-Markov Models of Recoverably Systems Vol. 11 , Kiev : Institut Matematiki Akademii Nauk UkrSSR (Institute of mathematics of the Academy of Sciences of the Ukrainian SSR) . (in Russian)
- Koroluk , V.S. and Turbin , A.F. 1982 . Processes of Markov's Recoverability in High Reliability Systems Tasks Kiev : Naukova Dumka . (in Russian)
- Shnourkoff , P.V. 1997 . The Two-Element System with One Restoring Device Optimum Maintenance . Stochastic Analysis and Applications , 15 ( 5 ) : 823 – 837 .