Multi-objective fuzzy inventory model with three constraints: a geometric programming approach. - Nirmal Kumar Mandal; Tapan Kumar Roy; Manoranjan Maiti (Fuzzy Sets Syst., 2005)

Multi-item imperfect production lot size model with hybrid number cost parameters. - Nirmal Kumar Mandal; Tapan Kumar Roy (Appl. Math. Comput., 2006)

Inventory model of deteriorated items with a constraint: A geometric programming approach. - Nirmal Kumar Mandal; Tapan Kumar Roy; Manoranjan Maiti (Eur. J. Oper. Res., 2006)

A displayed inventory model with L-R fuzzy number. - Nirmal Kumar Mandal; Tapan Kumar Roy (Fuzzy Optim. Decis. Mak., 2006)

Geometric Programming Approach to an Interactive Fuzzy Inventory Problem. - Nirmal Kumar Mandal (Adv. Oper. Res., 2011)