Mayr G., Alvarenga H., Mourer-Chauviré C. Out of Africa: Fossils shed light on the origin of the hoatzin, an iconic Neotropic bird // Naturwissenschaften 98. 2011. DOI:10.1007/s00114-011-0849-1. p. 961 – 6. (на английски)
Gerald Mayr and Vanesa L. De Pietri. Earliest and first Northern Hemispheric hoatzin fossils substantiate Old World origin of a „Neotropic endemic“ // Naturwissenschaften 101. 2014. DOI:10.1007/s00114-014-1144-8. p. 143 – 148. (на английски)
