Various works for voice; piano works; chamber music.
References
^Vlado Kotnik - Opera, power and ideology: anthropological study of a national art 2010 -p97 "The interwar generation of Slovenian opera composers was characterized by an eclectic range of styles, from Romanticism to modernism. The 1920s were dominated by the Expressionist composer Marij Kogoj,60 a pupil of Schoenberg and the 1930s.. Slavko Osterc"
Further reading
Don Randel, The Harvard Biographical Dictionary of Music. Harvard, 1996, p. 656.