https://www.vitruvius.com.br/revistas/read/drops/12.049/4064

http://talleravb.blogspot.com/2011/09/caveri.html

https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&ved=2ahUKEwigv8uzzaDkAhUvx4UKHfcfCuAQjRx6BAgBEAQ&url=https%3A%2F%2Fwww.clarin.com%2Farq%2Farquitectura%2Fobra-maestro-vida_0_Synl7fdqwmg.html&psig=AOvVaw13zOhC-tCqH_GF_V7kEOpx&ust=1566910990550587