//-->
Unravelling soft systems methodology
Georgiou, Ion, (2015)
Methods of operations research
Morse, Philip McCord, (1963)
Grounded theory in management research
Locke, Karen D., (2001)
Optimization techniques in operations research
Sivazlian, Boghos D., (1975)
An algorithm using Langrangian relaxation and column generation for one-dimensional clustering problems
Stanfel, Larry E., (1982)
Clustering problems with contiguity constraints
Stanfel, Larry E., (1977)