БІЛЕНЬКИЙ, А. Я.; КУЧЕР, О. Г. CONTRAST CRITERIA OF SYMMETRIC SYSTEMS OF WALSH FUNCTIONS. Proceedings of National Aviation University (archive), [S. l.], v. 15, n. 4, p. 105–114, 2021. DOI: 10.18372/2306-1472.15.15296. Disponível em: http://jrnl.kai.edu.ua/index.php/visnik/article/view/15296. Acesso em: 29 apr. 2026.