Egidio Colonna - http://www.newadvent.org/cathen/04127a.htm Article by C.A. Dubray from the Catholic Encyclopedia.
On the Errors of the Philosophers - http://medieval.ucdavis.edu/20B/Giles.html English translation of the first section of this work ascribed to Giles.
Giles of Rome - http://plato.stanford.edu/entries/giles/ Article by Roberto Lambertini from the Stanford Encyclopedia of Philosophy.
