Biography outlining major successes and failures and noting his pioneering work in phonographic recording. From the Grove Concise Dictionary of Music entry at WQXR radio.

Discussion of his place among operatic composers, especially his influence on verisimo. Includes photo and summary of his works.

Filmography at IMDb lists writing and music credits for various movies and television shows using his compositions. Most are various performances of or borrowings from I Pagliacci.

Biography and photographs, list of operas, and noted performers of his works.

Find A Grave listing with birth and death dates, biography, cemetery information, and interactive memorial.

Brief biographical sketch, caricature, summary of operatic works, and Naxos discography.

Wikipedia article with biography, lists of operas and operettas, and internal references to related people and topics.

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