STOYAN, Y. G.; GREBENNIK, I. V.; KALASHNIKOV, V. V.; LYTVYNENKO, O. S. Enumeration and Generation of Permutations with a Partially Fixed Order of Elements. International Journal of Combinatorial Optimization Problems and Informatics, [S. l.], v. 8, n. 1, p. 19–30, 2018. Disponível em: https://ijcopi.org/ojs/article/view/4. Acesso em: 24 apr. 2024.