Jonas Gregorio de Souza (Martxoaren 27, 2018). «Pre-Columbian earth-builders settled along the entire southern rim of the Amazon». Nature.com webgunean. [2]
newyorker.com
Grann, David (September 19, 2005). «The Lost City of Z». The New Yorker LXXXI (28): 56-81. ISSN 0028-792X. [1]