Ezimadu, Peter E., and Chukwuma R. Nwozo. “Modeling Dynamic Cooperative Advertising in a Decentralized Channel”. Yugoslav Journal of Operations Research 28, no. 4 (November 1, 2018): 539–566. Accessed August 26, 2025. https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/554.