WANG, TAO; WU, ZEFANG; YU, QINGLIN. Two-tough graphs and f-factors with given properties. Utilitas Mathematica , [S. l.], v. 90, 2013. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/985. Acesso em: 8 may. 2026.