Goodman, M.; Tagle, D. A.; Fitch, D. H.; et al. (1990). «Primate evolution at the DNA level and a classification of hominoids». Journal of Molecular Evolution. 30 (3): 260–266. Bibcode:1990JMolE..30..260G. PMID2109087. doi:10.1007/BF02099995
Mootnick, A.; Groves, C. P. (2005). «A new generic name for the hoolock gibbon (Hylobatidae)». International Journal of Primatology. 26 (4): 971–976. doi:10.1007/s10764-005-5332-4
Goodman, M.; Tagle, D. A.; Fitch, D. H.; et al. (1990). «Primate evolution at the DNA level and a classification of hominoids». Journal of Molecular Evolution. 30 (3): 260–266. Bibcode:1990JMolE..30..260G. PMID2109087. doi:10.1007/BF02099995
Goodman, M.; Tagle, D. A.; Fitch, D. H.; et al. (1990). «Primate evolution at the DNA level and a classification of hominoids». Journal of Molecular Evolution. 30 (3): 260–266. Bibcode:1990JMolE..30..260G. PMID2109087. doi:10.1007/BF02099995