(en) History of medicine, Surgery: 16th - 17th century AD, Historyworld
ifzg.hr
(sh)Banić-Pajnić, E., Astrologijska medicina u djelima renesansnih filozofa M – Ficina i Grisogona, Prilozi 69–70 (2009), str.11–35 [1][mrtav link] Posećeno 6. decembar2010
(en)Walsh, J.J. (1908). Constantine Africanus. In The Catholic Encyclopedia. New York: Robert Appleton Company. Retrieved December 13, 2010 from New Advent: [6]