ValuiskayaO. A., and YakovlevS. V. “Optimization of Linear Functions at the Vertices of a Permutation Polyhedron With Additional Linear Constraints”. Ukrains’kyi Matematychnyi Zhurnal 53, no. 9 (September 25, 2001): 1272-1280. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4346.