DOVBNIAK, T.S.; ZATORSKY, R.A. Parafunctions of matrices of vertical and horizontal structure. Carpathian Mathematical Publications, [S. l.], v. 4, n. 1, p. 36–42, 2012. Disponível em: https://journals.pnu.edu.ua/index.php/cmp/article/view/3677. Acesso em: 23 apr. 2024.