HEHER, A. Basis of Mathematical Model of Visual Recursive Systems for art-design objects. Theory and practice of design, [S. l.], n. 8, p. 54–59, 2015. DOI: 10.18372/2415-8151.8.10466. Disponível em: https://jrnl.nau.edu.ua/index.php/Design/article/view/10466. Acesso em: 23 feb. 2025.