ZHOU, SIZHONG; ZHANG, TAO; SUN, ZHIREN; XU, LAN. An improvement and generalization of all fractional factors in graphs. Utilitas Mathematica , [S. l.], v. 111, 2019. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/1423. Acesso em: 7 may. 2026.