Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
http://www.archipicture.eu/Architekten/Slovenia/Plecnik%20Joze/Joze%20Plecnik%20-%20Villa%20Langer%201.html
https://commons.m.wikimedia.org/wiki/File:Wien_Hietzing,_Beckgasse_30_-_1.JPG
https://www.pbase.com/bauer/image/122784547