Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
INTERNET http://commons.wikimedia.org/wiki/Category:Galleria_Vittorio_Emanuele_II_%28Milan%29?uselang=it
INTERNET http://www.layoverguide.com/2011/11/milan-layover.html/piazza-duomo-and-milan-cathedral-duomo-di-milano-in-milan-3
INTERNET http://www.greatbuildings.com/buildings/Galleria_Vittorio_Emanuel.html
INTERNET http://www.emeraldinsight.com/journals.htm?articleid=1956002&show=html
INTERNET http://de.wikipedia.org/wiki/Piazza_del_Duomo_%28Mailand%29