KALASHNIKOV, V. V.; AVRAMENKO, V. V.; KALASHNYKOVA, N. I.; KALASHNIKOV, V. V. A Cryptosystem Based Upon Sums of Key Functions. International Journal of Combinatorial Optimization Problems and Informatics, [S. l.], v. 8, n. 1, p. 31–38, 2018. Disponível em: https://ijcopi.org/ojs/article/view/5. Acesso em: 16 apr. 2024.