Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
https://es.wikipedia.org/wiki/Balloon_frame
http://www.arqhys.com/articulos/balloon-frame.html
http://blog.procore.com/blog/bid/378649/Balloon-Framing-A-Flash-in-the-Past-or-Glimpse-into-the-Future
http://www.inquiring-eye.com/anatomy/framing.htm
http://teddbenson.com/category/timber-frame-house/
https://en.wikipedia.org/wiki/Framing_(construction)#Platform_framing
http://ncpe.us/wp-content/uploads/2012/07/Obrien.pdf
http://slideplayer.com/slide/7386736/
http://www.jstor.org/stable/3514404?seq=1#page_scan_tab_contents