100 years since Blagovest Dolapchieff birth. Annual of Sofia University St. Kliment Ohridski. Faculty of Mathematics and Informatics, [S. l.], v. 98, p. 33–37, 2008. Disponível em: https://annual.uni-sofia.bg/index.php/fmi/article/view/127. Acesso em: 11 jan. 2026.