OstapenkoV. V., and FininG. S. “On the Solution of a Locally Finite System of Linear Inequalities With Graph Structure”. Ukrains’kyi Matematychnyi Zhurnal 53, no. 4 (April 25, 2001): 568-571. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4279.