↑ Dahlström, Fabian[in Swedish] (2003). Jean Sibelius: Thematisch-bibliographisches Verzeichnis seiner Werke[Jean Sibelius: A Thematic Bibliographic Index of His Works] (in German). Wiesbaden: Breitkopf & Härtel. ISBN3-7651-0333-0.
↑ Finland, a Country Study. US Department of the Army. 1974. p.109.
↑ Im Auftrag der Internationalen Allan-Pettersson-Gesellschaft von Michael Kube, ed. (1986). "Stichworte zur Biographie". Allan Pettersson Jahrbuch. 1986a (in German). Saarbrücken: Pfau Verlag. p.7. ISBN978-3-89727-192-0.
↑ "Erik Bergman". Independent. 9 May 2006. Retrieved 17 March 2025.
↑ Finn Benestad; Dag Schjelderup-Ebbe; William H. Halverson (1995). Johan Svendsen: the man, the maestro, the music. University of Nebraska Press. p.214. ISBN9780964523807.
↑ The Macmillan Encyclopedia of Music and Musicians: In One Volume. Macmillan. 1938. p.1088.
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