1. M. Živaljević, “The Contribution to the Research of the Fighter-Bomber Airplanes Systems Reliability Analysis and its Optimization“, These Doc. Ing., VTA, Belgrade, 1996. (in Serbian)
2. D. Teodorović and S. Kikuchi, “Introduction to Fuzzy Set Theory with Applications in Transportation Engineering“, Faculty of Transport and Traffic Engineering, University of Belgrade, 1991.
3. R. Belman and L. Zadeh, “Decision Making in a Fuzzy Environment“, Management Sci., 17, 1970.
4. A. Kaufmann and M. Gupta, “Introduction to Fuzzy Arithmetic“, Van Nostrand Reinhold, New York, 1985.
5. T. J. Ross, “Fuzzy Logic with Engineering Applications“, McGraw-Hill, New York, 1995.