FREYRE, P.; CUELLAR, O.; DÍAZ, N.; ALFONSO, A. Block Ciphers with Matrices Operating Alternately over Columns and Rows. Journal of Science and Technology on Information security, [S. l.], v. 2, n. 12, p. 18-29, 2021. DOI: 10.54654/isj.v2i12.84. Disponível em: https://isj.vn/index.php/journal_STIS/article/view/84. Acesso em: 4 dec. 2025.