Mootnick, A. R. and C. P. Groves (2005). “A new generic name for the hoolock gibbon (Hylobatidae)”. Int. J. Primatol. 26: 971–976. doi:10.1007/s10764-005-5332-4.
Mootnick, A. R. (2006). “Gibbon (Hylobatidae) species identification recommended for rescue or breeding centers”. Primate Conserv. 21: 103–138. doi:10.1896/0898-6207.21.1.103.