Multi-item Optimal control problem with fuzzy costs and constraints using Fuzzy variational principleJotindra Nath Roul, Kalipada Maity, Samarjit Kar and Manoranjan MaitiRAIRO-Oper. Res., 53 3 (2019) 1061-1082DOI: https://doi.org/10.1051/ro/2019022
