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Thomas, Evert; van Zonneveld, Maarten; Loo, Judy; Hodgkin, Toby; Galluzzi, Gea; van Etten, Jacob; Fuller, Dorian Q. (24. 10. 2012). „Present Spatial Diversity Patterns of Theobroma cacao L. in the Neotropics Reflect Genetic Differentiation in Pleistocene Refugia Followed by Human-Influenced Dispersal”. PLoS ONE. 7 (10): e47676. doi:10.1371/journal.pone.0047676.CS1 одржавање: Вишеструка имена: списак аутора (веза)
Powis, Terry G., W. Jeffrey Hurst, María del Carmen Rodríguez, Ponciano Ortíz C., Michael Blake, David Cheetham, Michael D. Coe & John G. Hodgson (децембар 2007). „Oldest chocolate in the New World”. Аntiquity. 81 (314). ISSN0003-598X. Приступљено 15. 2. 2011.
