Dahlström 2003, p. 114. 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.
Dahlström 2003, p. xxiv. 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.
Dahlström 2003, pp. 109, 113. 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.
Dahlström 2003, p. 109. 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.
Dahlström 2003, p. 113. 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.
fi.wikipedia.org
On 20 July 1905, the Helsinki-based music publisher Fazer & Westerlund [fi] (Helsingfors Nya Musikhandel) sold its Sibelius holdings (the publishing rights and printing plates) to the German firm of Breitkopf & Härtel.[2]