^abGerald Mayr and Vanesa L. De Pietri (2014). "Earliest and first Northern Hemispheric hoatzin fossils substantiate Old World origin of a "Neotropic endemic"". Naturwissenschaften. 101 (2): 143-148. doi:10.1007/s00114-014-1144-8. PMID24441712.
^Mayr G., Alvarenga H., Mourer-Chauviré C. (2011). "Out of Africa: Fossils shed light on the origin of the hoatzin, an iconic Neotropic bird". Naturwissenschaften. 98 (11): 961-6. doi:10.1007/s00114-011-0849-1. PMID21964974.KB1 bakım: Birden fazla ad: yazar listesi (link)