^"Florencio Constantino". Retrieved 2010-08-12. "He was born Florencio Constantineau in Bilbao (Basque part of Spain) on April 9, 1869 and finally immigrated to Argentina in 1889. While working as a ship’s engineer he discovered a voice of natural beauty and after a brief period of training with Leopoldo Stiatesi, a student of Lamperti , Constantino made his debut in Bréton’s La Dolores at the Teatro Solis in Montevideo, repeating the role in Buenos Aires at the Teatro Odéon. After spending some year ..."
^"Constantino is Dead". Los Angeles Times. November 25, 1919. Retrieved 2010-08-12. "Florencio Constantino for many years a great grand opera tenor is dead in Mexico City ... Constantino a son of the singer who is at the Mex ican capital now ..."