What A Character: Sterling Holloway Photo, biography, and filmography. http://www.what-a-character.com/cgi-bin/display.cgi?id=HollowayS

IMDb: Sterling Holloway Filmography, trivia, links, and other details. http://us.imdb.com/name/nm0001359/

Amy Howard: The Voice of Nova Interview by Project Neko. http://www.angelfire.com/ne/nekointerviews/amy.html