1. Dhillon, B.S.: Engineering Maintenance: A Modern Approach. CRC, Boca Raton, FL (2002)
2. Niebel, B.W.: Engineering Maintenance Management. Dekker, New York (1994)
3. Doyle, L.E.: How to Estimate Costs of New Products. In: Chironis, N.P. (ed.) Management Guide for Engineers and Technical Administrators. McGraw-Hill, New York, pp. 115–126 (1969)
4. Dhillon, B.S.: Medical Device Reliability and Associated Areas. CRC, Boca Raton, FL (2000)
5. Baker, N.R., Pound, W.J.: R and D project selection: where we stand. IEEE Trans. Eng. Manage. 11, 124–134 (1964)