Designing a single-vendor and multiple-buyers’ integrated production inventory model for interval type-2 fuzzy demand and fuzzy rule based deteriorationChayanika Rout, Ravi Shankar Kumar, Arjun Paul, Debjani Chakraborty and Adrijit GoswamiRAIRO-Oper. Res., 55 6 (2021) 3715-3742DOI: https://doi.org/10.1051/ro/2021174