Mitlif, Rasha Jalal, Saba S. Hasen, and Eman Hassan Ouda. 2022. “Solving Linear Programming Problems Involving Hexagonal and Octagonal Fuzzy Numbers via Two Ranking Functions”. Journal of Al-Qadisiyah for Computer Science and Mathematics 14 (4):Math Page 66-73. https://doi.org/10.29304/jqcm.2022.14.4.1117.