%0 Journal Article %A Malihe Niksirat %A S. Hadi Nasseri %T Knapsack Problem in Fuzzy Nature: Different Models Based on Credibility Ranking Method %J Yugoslav journal of operations research %D 2022 %P 203 %V 32 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/YJOR_2022_32_2_a4/ %G en %F YJOR_2022_32_2_a4