http://www.schirmer.com/composers/sierra/bio.html Biography and reviews from Schirmer. http://newalbion.com/artists/sierrar/ Biography, discography, collections from New Albion. http://www.robertosierra.com/ Official site. Includes biography, list of works, music samples, recent news, and further information and links. http://www.arts.cornell.edu/music/faculty/FinalIndividualWebPages/Sierra.html Cornell University faculty page with teaching specialties, courses, recent performances, research, selected publications and recordings, honors, awards and prizes, professional activities and affiliations, and degrees earned.