Professor Joaquim Fernandes is a Portuguese historian from Porto Univeristy who, along with Fina d’Armada, research famous apparitional incidents in Fatima (Portugal, 1917). Having access to original sources about this event, he came to conclusion that many aspects of Fatima incidents resemble modern UFO incidents. He coauthored three books on this topic: "Celestial Secrets", "Heavenly Lights" and "Fatima Revisited" published by Anomalist Books.

 

Sources:

http://ufodigest.com/article/interview-prof-joaquim-fernandes