Wich, S. A.; Utami-Atmoko, S. S.; Setia, T. M.; Rijksen, H. D.; Schürmann, C.; van Hooff, J.A.R.A.M.; van Schaik, C. P. (2004). "Life history of wild Sumatran orangutans (Pongo abelii)". Journal of Human Evolution. 47 (6): 385–398. doi:10.1016/j.jhevol.2004.08.006. PMID15566945.
Singleton, I.; van Schaik, C. P. (2002). "The social organisation of a population of Sumatran orang-utans". Folia Primatologica. 73 (1): 1–20. doi:10.1159/000060415. PMID12065937. S2CID13557435.
Pradhan, G. R.; van Noordwijk, M. A.; van Schaik, C. P. (2012). "A model for the evolution of developmental arrest in male orangutans". American Journal of Physical Anthropology. 149 (1): 18–25. doi:10.1002/ajpa.22079. PMID22552966.
Ihms, E. A.; Daniels, J. B.; Koivisto, C. S.; Barrie, M. T.; Russell, D. S. (2014). "Fatal Streptococcus anginosus-associated pneumonia in a captive Sumatran orangutan (Pongo abelii)". Journal of Medical Primatology. 43 (1): 48–51. doi:10.1111/jmp.12085. ISSN1600-0684. PMID24117447. S2CID5334957.
Buij, R.; Wich, S. A.; Lubis, A. H.; Sterck, E. H. M. (2002). "Seasonal movements in the Sumatran orangutan (Pongo pygmaeus abelii) and consequences for conservation". Biological Conservation. 107 (1): 83–87. Bibcode:2002BCons.107...83B. doi:10.1016/s0006-3207(02)00048-4.
Buij, R.; Wich, S. A.; Lubis, A. H.; Sterck, E. H. M. (2002). "Seasonal movements in the Sumatran orangutan (Pongo pygmaeus abelii) and consequences for conservation". Biological Conservation. 107 (1): 83–87. Bibcode:2002BCons.107...83B. doi:10.1016/s0006-3207(02)00048-4.
Wich, S. A.; Utami-Atmoko, S. S.; Setia, T. M.; Rijksen, H. D.; Schürmann, C.; van Hooff, J.A.R.A.M.; van Schaik, C. P. (2004). "Life history of wild Sumatran orangutans (Pongo abelii)". Journal of Human Evolution. 47 (6): 385–398. doi:10.1016/j.jhevol.2004.08.006. PMID15566945.
Singleton, I.; van Schaik, C. P. (2002). "The social organisation of a population of Sumatran orang-utans". Folia Primatologica. 73 (1): 1–20. doi:10.1159/000060415. PMID12065937. S2CID13557435.
Pradhan, G. R.; van Noordwijk, M. A.; van Schaik, C. P. (2012). "A model for the evolution of developmental arrest in male orangutans". American Journal of Physical Anthropology. 149 (1): 18–25. doi:10.1002/ajpa.22079. PMID22552966.
Ihms, E. A.; Daniels, J. B.; Koivisto, C. S.; Barrie, M. T.; Russell, D. S. (2014). "Fatal Streptococcus anginosus-associated pneumonia in a captive Sumatran orangutan (Pongo abelii)". Journal of Medical Primatology. 43 (1): 48–51. doi:10.1111/jmp.12085. ISSN1600-0684. PMID24117447. S2CID5334957.
Cohen, Jon (26 January 2011). "Orangutan genome full of surprises". Science Now. American Association for the Advancement of Science. Archived from the original on 30 January 2011. Retrieved 28 January 2011.
Singleton, I.; van Schaik, C. P. (2002). "The social organisation of a population of Sumatran orang-utans". Folia Primatologica. 73 (1): 1–20. doi:10.1159/000060415. PMID12065937. S2CID13557435.
Ihms, E. A.; Daniels, J. B.; Koivisto, C. S.; Barrie, M. T.; Russell, D. S. (2014). "Fatal Streptococcus anginosus-associated pneumonia in a captive Sumatran orangutan (Pongo abelii)". Journal of Medical Primatology. 43 (1): 48–51. doi:10.1111/jmp.12085. ISSN1600-0684. PMID24117447. S2CID5334957.
sumatrajungle.com
"Orangutan facts". Science & Nature. 6 March 2022. Retrieved 2022-03-30.
Cohen, Jon (26 January 2011). "Orangutan genome full of surprises". Science Now. American Association for the Advancement of Science. Archived from the original on 30 January 2011. Retrieved 28 January 2011.
Ihms, E. A.; Daniels, J. B.; Koivisto, C. S.; Barrie, M. T.; Russell, D. S. (2014). "Fatal Streptococcus anginosus-associated pneumonia in a captive Sumatran orangutan (Pongo abelii)". Journal of Medical Primatology. 43 (1): 48–51. doi:10.1111/jmp.12085. ISSN1600-0684. PMID24117447. S2CID5334957.