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Using fuzzy sets in operational research
Zimmermann, H.-J., (1983)
Applicable systems thinking
Stainton, R. S., (1984)
Heuristics and their design : a survey
Müller-Merbach, Heiner, (1981)
Chromatic optimisation: Limitations, objectives, uses, references
Krarup, J., (1982)
Decomposition of bipartite multigraphs into methodings
Werra, D. de, (1972)
An introduction to timetabling
Werra, D. de, (1985)