Nathaniel Bletter, Douglas C. Daly, "Cacao and its relatives in South America" in Cameron L. McNeil, ed., Chocolate in Mesoamerica: a cultural history of cacao (Gainesville: University Press of Florida, 2006) pp. 31-68
Sophie D. Coe, America's First Cuisines (Austinopoli: University of Texas Press, 1994) p. 144
Johanna Kufer, Cameron L. McNeil, "The Jaguar Tree (Theobroma bicolor Bonpl.)" in Cameron L. McNeil, ed., Chocolate in Mesoamerica: a cultural history of cacao (Gainesville: University Press of Florida, 2006) pp. 90-104