LIU, WEICHAN; GONG, CHEN; WU, LIFANG; ZHANG, XIN. A note on the vertex arboricity of signed Graphs. Utilitas Mathematica , [S. l.], v. 106, 2018. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/1349. Acesso em: 26 may. 2026.