GROŠEK, Otokar; ŠIŠKA, Július. Semigroup of Matrices over GF{2^s} and Its Relation to AES. COMPUTING AND INFORMATICS, [S. l.], v. 22, n. 5, p. 417–426, 2012. Disponível em: https://www.cai.sk/ojs/index.php/cai/article/view/462. Acesso em: 4 may. 2024.