KLAMROTH, KATHRIN; MENGERSEN, INGRID. The Ramsey number r(K1,3, C4, K4). Utilitas Mathematica , [S. l.], v. 52, 1997. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/51. Acesso em: 8 may. 2026.