Y. AL-BAYATI, A.; E. KHALID, H. Multi-Objective GPP with General Negative Degree of Difficulty: New Insights. IRAQI JOURNAL OF STATISTICAL SCIENCES, [S. l.], v. 11, n. 2, p. 35–51, 2011. DOI: 10.33899/iqjoss.2011.027862. Disponível em: https://ojs.uomosul.edu.iq/index.php/stats/article/view/29371. Acesso em: 5 sep. 2025.