Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
http://www.siracusaturismo.net/public/eventi/Adolfo_Natalini.jpg
http://www.loschermo.it/articoli/view/12192
http://st-ar.nl/deadly-serious-%E2%80%93-interview-with-adolfo-natalini/