Imeniti bălgarski operni pevci = Famous Bulgarian opera voices - Kabaivanska, Raina 1934-; Nikolov, Nikola 1925-2007; Wiener, Julia 1929-2010; Ghiaurov, Nicolai 1929-2004; Milčeva-Nonova, Aleksandrina 1934-; Gjuzelev, Nikola 1936-2014 (Balkanton, 1970)