БЕЛЕЦКИЙ, А. Я. A cryptographic use indicator matrices systems Walsh functions. Ukrainian Information Security Research Journal, [S. l.], v. 18, n. 1, p. 5–15, 2016. DOI: 10.18372/2410-7840.18.10107. Disponível em: http://jrnl.kai.edu.ua/index.php/ZI/article/view/10107. Acesso em: 13 jun. 2026.