Tenaza, R. (15 december 1984). ”Songs of hybrid gibbons (Hylobates lar × H. muelleri)”. American Journal of Primatology "8" (3): ss. 249–253. doi:10.1002/ajp.1350080307.
Geissmann, Thomas (maj 2009). ”Door slamming: Tool-use by a captive white-handed gibbon (Hylobates lar)”. Gibbon Journal Issue No. 5. Gibbon Conservation Alliance (www.gibbonconservation.org). sid. 53–60. Arkiverad från originalet den 14 september 2012. https://web.archive.org/web/20120914005249/http://www.gibbonconservation.org/07_journal/gibbon_journal_5.pdf. Läst 17 april 2010. ”A typical cycle of events occurring several times in a gibbon duet song bout begins with male short phrases (often accompanied by female short phrases), followed by the onset of a female great-call. The male falls silent during the build-up phase of the great-call and adds a coda at the climax. After that, he resumes the production of short phrases (again, with or without female short phrases).”
Geissmann, Thomas (maj 2009). ”Door slamming: Tool-use by a captive white-handed gibbon (Hylobates lar)”. Gibbon Journal Issue No. 5. Gibbon Conservation Alliance (www.gibbonconservation.org). sid. 53–60. Arkiverad från originalet den 14 september 2012. https://web.archive.org/web/20120914005249/http://www.gibbonconservation.org/07_journal/gibbon_journal_5.pdf. Läst 17 april 2010. ”A typical cycle of events occurring several times in a gibbon duet song bout begins with male short phrases (often accompanied by female short phrases), followed by the onset of a female great-call. The male falls silent during the build-up phase of the great-call and adds a coda at the climax. After that, he resumes the production of short phrases (again, with or without female short phrases).”