Alvino, Carmine. "I Sette Angeli nel Panorama Cattolico (the Seven Angels in the Catholic Context)". I Sette Arcangeli nel Cattolicesimo [The Seven Archangels in the Catholicism] (PDF) (in Italian). Archived from the original on September 29, 2022.
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Alvino, Carmine. "I Sette Angeli nel Panorama Cattolico (the Seven Angels in the Catholic Context)". I Sette Arcangeli nel Cattolicesimo [The Seven Archangels in the Catholicism] (PDF) (in Italian). Archived from the original on September 29, 2022.
Besse, Jean. "João Mendes de Silva."The Catholic Encyclopedia Vol. 10. New York: Robert Appleton Company, 1911. 22 September 2022 This article incorporates text from this source, which is in the public domain.