Vendor-buyer integrated production-inventory system for imperfect quality item under trade credit finance and variable setup costDipana Jyoti Mohanty, Ravi Shankar Kumar and Adrijit GoswamiRAIRO-Oper. Res., 52 4-5 (2018) 1277-1293DOI: https://doi.org/10.1051/ro/2018014