Filmography with credited films from the Internet Movie Database.

Wikipedia entry with life, major accomplishments, and internal links to related people and topics.

Detailed biography tracing his multi-part career in the academic, compositional, and performance realms.

Biographical chronology at operaitaliana.net emphasizing his operatic works.

Program notes for the Sierra Chamber Society with commentary by David Ewen, biography, and synopsis of his "Rispetti e Strombotti for String Quartet."

Remarks about music in general and his own output compiled by Marcello Sorce Keller. Includes footnotes.

Listing at The Lied and Art Song Texts Page with lyrics to selected vocal works.

Brief biographical sketch mentioning compositional and musicological work with Naxos discography.

Details of the collection held by the Giorgio Cini Foundation in Venice.

Biography noting his musicological efforts and tracing his compositional development with summary list of works from the Grove Concise Dictionary of Music entry at WQXR radio.

Short biography noting his relatively late beginning a musical career with chronological list of works.