Stoyanova, Rumyana, and Ivan Tchobanov. “The Mathematical Papers of Blagovest Dolaptchiev. An Attempt on an Analytical Bibliography”. Ann. Sofia Univ. Fac. Math. and Inf. 88 (December 12, 1996): 179–219. Accessed December 4, 2024. https://ftl5.uni-sofia.bg/index.php/fmi/article/view/381.