Heller, Stephen (1813 - 1888) Biographical data, recommended CDs, books and sheet music, bibliography, and links to biographical essays from Dr. Estrella's Incredibly Abridged Dictionary of Composers. http://stevenestrella.com/composers/composerfiles/heller1888.html

Heller, Stephen Brief profile and mp3 sample of his work. From Karadar Classical Music. http://www.karadar.net/Dictionary/heller.html

Heller, Stephen (1813 - 1888) Brief profile and description of works from Naxos. http://www.hnh.com/composer/heller.htm

Classical Music Archives: Heller Music files offered in MIDI format. http://www.classicalarchives.com/main-h.html#HELLER

Jan Erik Hansen: Stabat Mater Information on the piece with brief biography, debut date, performers, length, particulars, textual variants, and musician, and conductor details for the CD. http://www.stabatmater.dds.nl/hansen.html