1. Applied Fuzzy Systems, Ed. by T. Terano, K. Asai, and M. Sugeno (Academic, New York, 1994).
2. Resume on dealing with uncertainty/ambiguity in conjunction with knowledge engineering;K. Tanaka,1982
3. Yu. P. Pyt’ev, “Modeling of subjective judgments made by a researcher-modeler about the model of the research object,” Math. Model. Comput. Simul. 5, 538–557 (2013).
4. Yu. P. Pyt’ev, Probability, Opportunity and Subjective Modeling in Research. Mathematical, Empirical Foundations, Applications (Fizmatlit, Moscow, 2017) [in Russian].
5. Yu. P. Pyt’ev, Opportunity as an Alternative to Probability, 2nd ed. (Fizmatlit, Moscow, 2016) [in Russiain].