HRYTSYK, V. . RESEARCH OF IMAGE THEORY: SETS OF POINTS AND OPERATIONS ON THEM. APPLIED QUESTIONS OF MATHEMATICAL MODELLING, [S. l.], v. 4, n. 2.1, 2021. DOI: 10.32782/KNTU2618-0340/2021.4.2.1.10. Disponível em: //ojs.kntu.net.ua/index.php/aqmm/article/view/138. Acesso em: 7 трав. 2024.