Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
https://tha2blog.wordpress.com/2016/11/02/camillo-sitte/
http://architectureandurbanism.blogspot.com/2010/01/camillo-sitte-1843-1903-city-building.html
http://www.aeiou.at/aeiou.encyclop.s/s606159.htm