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Applicable systems thinking
Stainton, R. S., (1984)
Heuristics and their design : a survey
Müller-Merbach, Heiner, (1981)
DP/MIS and OR : what was, what is, what could be
Sadleir, C. D., (1982)
Modelling vagueness in decision models
Zimmermann, Hans-Jürgen, (1986)
Theory and applications of fuzzy sets - Théorie et applications des ensembles brouillés
Zimmermann, H.-J., (1978)
Fuzzy sets, decision making and expert systems
Zimmermann, Hans-Jürgen, (1987)