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Using fuzzy sets in operational research
Zimmermann, H.-J., (1983)
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)
OR : a personal perspective
Stainton, R. S., (2010)
Heuristics--the relational approach
Stainton, R. S., (1984)
A five facet frame for the design of heuristics --A rejoinder