Boveda-Penalba, A.J.; Vermeer, J.; Rodrigo, F. and Guerra-Vasquez, F. 2009. Preliminary report on the distribution of Callicebus oenanthe on the eastern feet of the Andes. Int. J. Primatol. 30: 467-480.
Shanee, S.; Tello-Alvarado, J.C.; Vermeer, J. and Bóveda-Penalba, A.J. 2011. GIS Risk Assessment and GAP Analysis for the Andean Titi Monkey Callicebus oenanthe. Primate Conservation 26: 1-7.
Tello-Alvarado, J.C. 2011. Una nueva localidad para el Búho Estigio Asio stygius al este de los Andes del Perú. Boletín Informativo del Unión Ornitológica del Perú 61: 9-11.
Tello-Alvarado, J.C. and Vermeer, J. 2011. Ouakari chauve: à la découverte d’une nouvelle population au nord-est du Pérou. CEPA Magazine 23 : 8-11.
Tello-Alvarado, J.C.; Villacis del Castillo, J.T. and Vermeer, J. 2012. Verbreitung des Andes-Springaffen am westlichen Ufer des Huallaga-Flusses in der perunaischem San-Martin-Region. ZGAP MITTEILUNGEN 12012: 28.
Vermeer, J.; Tello-Alvarado, J.C.; Moreno-Moreno, S. and Guerra-Vásquez, F. 2011. Extension of the Geographical Range of White-browed Titi Monkeys Callicebus discolor and Evidence for Sympatry with San Martin Titi Monkeys Callicebus oenanthe. Int. J. of Primatol. 324: 924-930.
Vermeer, J. 2009. On the identification of Callicebus cupreus and Callicebus brunneus. Neotropical Primates 62: 71-73.
Vermeer, J., & Tello-Alvarado, J. (2015). The Distribution and Taxonomy of Titi Monkeys (Callicebus) in Central and Southern Peru, with the Description of a New Species. Primate Conservation 29, p. 9-29.
Vermeer, J., Tello-Alvarado, J., Villacis Del Castillo, J., & Bóveda-Penalba, A. (2013). A new population of red uakaris (Cacajao calvus ssp.) in the mountains of north-eastern Peru. Neotropical Primates 20(1), p. 12-17.