MANSTAVIČIUS, Eugenijus; SKRABUTĖNAS, Rimantas. An analytic problem in combinatorial structures. Lietuvos matematikos rinkinys, [S. l.], v. 40, n. spec., p. 61–67, 2000. DOI: 10.15388/LMR.2000.35052. Disponível em: https://journals.vu.lt./LMR/article/view/35052. Acesso em: 3 apr. 2025.