(EN) Colin Groves, Callicebus, in D.E. Wilson e D.M. Reeder (a cura di), Mammal Species of the World. A Taxonomic and Geographic Reference, 3ª ed., Johns Hopkins University Press, 2005, 141-146, ISBN0-8018-8221-4.
(EN) Colin Groves, Callicebus, in D.E. Wilson e D.M. Reeder (a cura di), Mammal Species of the World. A Taxonomic and Geographic Reference, 3ª ed., Johns Hopkins University Press, 2005, ISBN0-8018-8221-4.
(EN) Vari autori in riferimento alle singole specie analizzate, Red List Titi Monkeys, su The IUCN Red List of Threatened Species. Version 2022-1. URL consultato il 20 ottobre 2022.
Russell A. Mittermeier e Anthony B. Rylands; Christoph Schwitzer; Lucy A. Taylor; Federica Chiozza; Elizabeth A. Williamson, Primates in Peril: The World’s 25 Most Endangered Primates 2010–2012, in IUCN/SSC Primate Specialist Group (PSG) International Primatological Society (IPS) Conservation International (CI), Arlington, VA., 2012. URL consultato il 20 ottobre 2022.
Jan Vermeer e Vermeer, Primates in Peril: The World’s 25 Most Endangered Primates 2012–2014, in IUCN SSC Primate Specialist Group (PSG), International Primatological Society (IPS), Conservation International (CI), and Bristol Zoological Society, Arlington, VA, 2014. URL consultato il 20 ottobre 2022.
Thomas R. Defler e Javier García: Diana C. Guzmán-Caro, Primates in Peril: The World’s 25 Most Endangered Primates 2016–2018, in IUCN SSC Primate Specialist Group (PSG), International Primatological Society (IPS), Conservation International (CI), and Bristol Zoological Society, Arlington, VA, 2017. URL consultato il 20 ottobre 2022.
Jesus Martinez e Robert Wallace, Primates in Peril: The World’s 25 Most Endangered Primates 2018–2020, in IUCN SSC Primate Specialist Group, International Primatological Society, Global Wildlife Conservation, and Bristol Zoological Society, Washington, DC, 2020. URL consultato il 20 ottobre 2022.
Jean Philippe Boubli e Gustavo Rodrigues Canale; Thiago B.F. Semedo; Fabiano R. de Melo: Leandro Jerusalinsky, Primates in Peril: The World’s 25 Most Endangered Primates 2022–2023., in IUCN SSC Primate Specialist Group, International Primatological Society, Re:wild, Washington, DC., 2022. URL consultato il 20 ottobre 2022.