Konstruktivnai︠a︡ teorii︠a︡ funkt︠s︡iĭ '77 : trudy Mezhdunarodnoĭ konferent︠s︡ii po konstruktivnoĭ teorii funkt︠s︡iĭ, Blagoevgrad, 30 mai︠a︡-6 ii︠u︡ni︠a︡ 1977 g. = Constructive function theory '77 : proceedings of the International Conference on Constructive Function Theory, Blagoevgrad, May 30-June 6, 1977 - International Conference on Constructive Function Theory; Sendov, Blagovest Khristov; Vachov, Dimitŭr; Edinen t︠s︡entŭr po matematika i mekhanika (Bŭlgarska akademii︠a︡ na naukite) (Izd-vo Bulgarskoĭ Akademii Nauk, 1980)