@article{rylands_keuroghlian_1988,  title={Primate populations in continuous forest and forest fragments in Central Amazonia},  volume={18},  ISSN={0044-5967},  url={https://doi.org/10.1590/1809-43921988183307},  DOI={10.1590/1809-43921988183307},  number={3-4},  journal={Acta Amazonica},  publisher={Instituto Nacional de Pesquisas da Amazônia},  author={Rylands, Anthony B. and Keuroghlian, Alexine},  year={1988},  pages={291–307} }