Behret, Hülya, and Cengiz Kahraman. “A multi‐period Newsvendor Problem With pre‐season Extension under Fuzzy Demand”. Journal of Business Economics and Management 11, no. 4 (December 31, 2010): 613-629. Accessed November 15, 2024. https://mla.vgtu.lt/index.php/JBEM/article/view/5877.