1. Applications of Fuzzy Sets to System Analysis;Negoita,1975
2. Orderings, preferences, and fuzzy optimization;Ralescu,1978
3. Management Applications of System Theory;Negoita,1979
4. Optimization in fuzzy environment;Zimmermann,1974
5. On fuzzy mathematical programming and tolerances in planning;Negoita;Econom. Comp. Econom. Cybernet. (Stud. Res.),1976