Kapolyi, Laszlo, and Ferenc Szidarovszki. “Control of Dynamic Oligopsonies With Production Factors”. CUBO, A Mathematical Journal 5, no. 3 (October 1, 2003): 423–428. Accessed May 20, 2024. https://cubo.ufro.cl/ojs/index.php/cubo/article/view/1685.