Prof. Dimiter Skordev in the memories of his contemporaries. Annual of Sofia University St. Kliment Ohridski. Faculty of Mathematics and Informatics, [S. l.], v. 109, p. 5–18, 2022. DOI: 10.60063/gsu.fmi.109.5-18. Disponível em: https://annual.uni-sofia.bg/index.php/fmi/article/view/562. Acesso em: 14 dec. 2025.