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2. A. I. Orlov, Optimization Problems and Fuzzy Variables [in Russian], Moscow (1980).
3. A. I. Orlov, ?Statistics of fuzzy objects, and algorithms and software in applied statistics,? Second All-Union School-Seminar on Algorithms and Programs for Multivariate Statistical Analysis, Abstracts of papers [in Russian], Moscow (1983).
4. A. I. Orlov, ?Foundations of fuzzy set theory (a generation of Zadeh's apparatus). Random tolerances,? in: Algorithms of Multivariate Statistical Analysis and Their Applications [in Russian], TsEMI, Moscow (1975).
5. G. V. Raushenbakh and O. V. Filippov, A Manual for Expert Evaluation of Planned and Completed Research Projects in Medicine [in Russian], Moscow (1982).