Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
INTERNET http://www.rositour.it/Italia/Emilia/Bologna/Bologna1.htm
INTERNET http://www.superstock.com/stock-photos-images/1899-47242
INTERNET http://www.crankyprofessor.com/?p=2143
INTERNET http://www.scultura-italiana.com/Galleria/Della%20Quercia%20Jacopo/imagepages/image50.html
INTENRNET http://www.scultura-italiana.com/Galleria/Della%20Quercia%20Jacopo/imagepages/image48.html
INTERNET http://www.lib-art.com/artgallery/1159-jacopo-della-quercia.html
INTERNET http://www.friendsofart.net/en/art/jacopo-della-quercia/expulsion-of-adam-and-eve-from-the-paradise
INTERNET