6Morteza Pakdin Amiri.Project selection for oil-fields development by using the AHP and fuzzy TOPSIS methods[J].Expert Systems With Applications,2010,379:.
7Chang D Y.Applications of the extent analysis method on fuzzy AHP[J].European journal of operational research,1996,95(3):649-655.
8Chen C T.Extensions of the TOPSIS for group decision-making under fuzzy environment[J].Fuzzy sets and systems,2000,114(1):1-9.