Vermeer, J.; Tello-Alvarado, J. C. (2015). "The Distribution and Taxonomy of Titi Monkeys (Callicebus) in Central and Southern Peru, with the Description of a New Species". Primate Conservation. 29: 9–29. doi:10.1896/052.029.0102.
Dalponte, Julio César; Silva, Felipe Ennes; Silva Júnior, José de Sousa e. (2014). "New species of titi monkey, genus Callicebus Thomas, 1903 (Primates, Pitheciidae), from Southern Amazonia, Brazil". Papéis Avulsos de Zoologia. 54. doi:10.1590/0031-1049.2014.54.32.
Boubli, J. P.; M. N. F. Da Silva; M. V. Amado; T. Hrbek; F. B. Pontual; I. P. Farias (2008). "A Taxonomic Reassessment of Cacajao melanocephalus Humboldt (1811), with the Description of Two New Species". International Journal of Primatology. 29 (3): 723–741. doi:10.1007/s10764-008-9248-7. S2CID26561719.
Silvestro, Daniele; Tejedor, Marcelo F.; Serrano Serrano, Martha L.; Loiseau, Oriane; Rossier, Victor; Rolland, Jonathan; Zizka, Alexander; Antonelli, Alexandre; Salamin, Nicolas (2017). "Evolutionary history of New World monkeys revealed by molecular and fossil data". bioRxiv10.1101/178111.
Boubli, J. P.; M. N. F. Da Silva; M. V. Amado; T. Hrbek; F. B. Pontual; I. P. Farias (2008). "A Taxonomic Reassessment of Cacajao melanocephalus Humboldt (1811), with the Description of Two New Species". International Journal of Primatology. 29 (3): 723–741. doi:10.1007/s10764-008-9248-7. S2CID26561719.