Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
http://en.wikipedia.org/wiki/John_C._Portman,_Jr.
http://www.georgiaencyclopedia.org/articles/arts-culture/john-portman-b-1924
http://wabe.org/post/conversation-renowned-architect-and-developer-john-portman
http://www.wwd.com/eye/people/down-south-a-hometown-salute-for-john-portman-2379875
http://www.bizjournals.com/atlanta/print-edition/2012/06/15/john-portman.html?s=image_gallery