NENOV, N. LOWER BOUNDS FOR SOME RAMSEY NUMBERS. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 96, p. 85–87, 2004. Disponível em: https://stipendii.uni-sofia.bg/index.php/fmi/article/view/163. Acesso em: 16 apr. 2025.