Dutta, Dhiman, Mausumi Sen, and Biplab Singha. 2020. “Multi-Item Multi-Objective Fixed Charged Solid Transportation Problem With Type-2 Fuzzy Variables”. Proyecciones (Antofagasta, On Line) 39 (3):621-37. https://doi.org/10.22199/issn.0717-6279-2020-03-0038.