Tài liệu tham khảo

WikiPedia: Vượn đen Siki http://www.google.com/books?id=JgAMbNSt8ikC&pg=PA1... http://gibbons.de/main/papers/pdf_files/1995gibbon... http://www.gibbons.de/main/photo/14siki.html http://www.departments.bucknell.edu/biology/resour... //doi.org/10.2305%2FIUCN.UK.2020-2.RLTS.T39896A179... http://www.fossilworks.org/cgi-bin/bridge.pl?a=tax... http://www.primate-sg.org/PDF/VJP1.1.speciation.bi... //www.worldcat.org/oclc/62265494 https://www.departments.bucknell.edu/biology/resou... https://www.itis.gov/servlet/SingleRpt/SingleRpt?s...