(english) About genetic diversity and Structure of Managed and Semi-natural Populations of Cocoa (Theobroma cacao) in the Huallaga and Ucayali Valleys of Peru -NCBI: The National Center for Biotechnology Information

(english) Geographic and genetic population differentiation of the Amazonian chocolate tree (Theobroma cacao L) - PLOS, Public library of science

(french) About the installation of alternative crops to coca cultivation in high oriental valley of Amazon river -Courrier international

(spanish) Some of cocoa trees which are found in Peru -MINAGRI Peru

(french) A study on the conquest of the Huallaga populations in the 17th and 18th centuries, as well as other historical sources relating to the history of the valley of the Huallaga IFEA-French Institute of Andean studies.

(spanih) The full version of the letter to King Philip II of Spain by Lope de Aguirre the seditious and bloodthirsty conqueror -SSU Salen State University

(spanish)Study on the identification of criollo cocoa as native product of the biodiversity of San Martin and evaluation of its regional potential- ICT E.Arévalo Gardini

On a google map location in Central America, the Caribbean Islands and South of some cocoatrees plantations historically identified since pre-Hispanic and colonial America. Their characteristics and some historic elements are also developed.