KHOMENKO, N. P.; Gavrіlуuk O. N. Selection of the subgraphs of some types from the given graph . Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 18, n. 5, p. 117–122, 1966. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8449. Acesso em: 6 dec. 2025.