http://www.slideshare.net/jmarulanda/la-construccin-en-climas-calidos-presentation http://www.tdr.cesca.es/TESIS_UPC/AVAILABLE/TDX-0216104-100306//03PARTE2_2.pdf
http://www.portalnet.cl/comunidad/albums/small/86/99c7823aa19dc4b85f7a68c5e7d565aa_86361.jpg?dl=1296268103