Official site. Biography, photograph, critical appraisals, sound samples of selected works, and links to more about himself plus sites of general musical interest.

Wikipedia article with detailed biography summarizing his varied works with internal references to related topics and external links.

Entry at the Lied and Art Songs Text Page with list of vocal works linked to lyrics.

Chronological list of works, biography, photograph, and links from the Classical Composers Database.

Extended critical analysis of his works with personal and professional biographical details by David C. F. Wright. Includes a glowing review of the orchestral premiere of his Concerto for Four Horns and Orchestra.