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Filippo Brunelleschi Biography. 1 March 2013 <http://www.biography.com/people/filippo-brunelleschi-9229632>.
Robertson, J J O'Connor and E F. Brunelleschi Biography. February 2002. 1 March 2013 <http://www-history.mcs.st-and.ac.uk/Biographies/Brunelleschi.html>.