Popivanov П. 120 years from the birthday of Prof. Georgi Bradistilov, corresponding member of BAS. Mathematics and Education in Mathematics, [S. l.], v. 53, p. 198–202, 2024. DOI: 10.55630/mem.2024.53.198-202. Disponível em: https://smb.math.bas.bg/mem/index.php/memjournal/article/view/154. Acesso em: 6 oct. 2026.