VIZOR , Y. E. METHODS FOR CALCULATION OF PRIMARY ROOTS IN RESIDUAL CLASSES. Problems of Informatization and Management, [S. l.], v. 1, n. 16, p. 28–35, 2006. Disponível em: https://jrnl.nau.edu.ua/index.php/PIU/article/view/16395. Acesso em: 17 feb. 2026.