Lashgari, M., Sadjadi, S. J., & Heydari, M. "Gift Card Pricing through its Pre-sales and Ordering Decisions in a Two-echelon Supply Chain with a Separate Sales Channel and Price-sensitive Demand", Advances in Industrial Engineering, 57, 1, 2023, 35-73. doi: 10.22059/aie.2022.342830.1837