WANG, HAOLI; XU, XIRONG; YUANSHENG, YANG; WANG, LEI. On the 3-γt-Critical Graphs of Order Δ(G) + 3. Utilitas Mathematica , [S. l.], v. 84, 2011. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/802. Acesso em: 8 may. 2026.