Peña-Macias, Victor, and Humberto Sarria. “Linear Programming Problems in Network Coding and Closure Operators via Partitions”. Selecciones Matemáticas 6, no. 02 (December 24, 2019): 264-274. Accessed May 9, 2024. https://revistas.unitru.edu.pe/index.php/SSMM/article/view/2633.