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On bi-level integer non linear multiobjective goal programming problem based on fuzzy approach
Emam, O. E., (2010)
Stochastic fuzzy multi-level multi-objective fractional programming problem : a FGP approach
Osman, M. S., (2017)
Architecting a fully fuzzy information model for multi-level quadratically constrained quadratic programming problem
AbdAlhakim, Hawaf, (2019)