DE ITA LUNA, Guillermo; ALEMÁN, Yuridiana; LOYA, Nahum. Polynomial Strategies for the 3-Coloring of a Graph. Acta Universitaria, [S. l.], v. 22, p. 55–61, 2012. DOI: 10.15174/au.2012.342. Disponível em: https://www.actauniversitaria.ugto.mx/index.php/acta/article/view/342. Acesso em: 6 may. 2026.