English: The Portuguese Columbus: secret agent of King John II, Palgrave Macmillan, ISBN 0-333-56315-8Ra Gerusalemme deliverâ, Genoa, 1745, XV-32http://www.bruceruiz.net/PanamaHistory/bartolome_colon.htm
English: The Portuguese Columbus: secret agent of King John II, Palgrave Macmillan, ISBN 0-333-56315-8== References ==== External links ==*Bartolomé Colómbo