Bektybaeva З. Quadratic geometric transformation generated by ball mappings and its applications. Рroblems of engineering and professional education, [S. l.], v. 7, n. 7, p. 77, 2023. DOI: 10.32523/2220-685X-2011-7-7-77. Disponível em: https://bulprengpe.enu.kz/index.php/main/article/view/304. Acesso em: 12 may. 2024.