Brockelman, Warren Y. et. al. 1998. Dispersal, Pair Formation, and social structure in gibbons (Hylobates lar). Behav Ecol Sociobiol. 42(5): 329-339.

Carpenter, C.R. 1940. A field study in Siam of the behavior and social relations of the gibbon (Hylobates lar). Comparative Psychology Monographs. 16(5): all.

Chivers, David J. 2000. The Swinging Singing Apes: Fighting for food and Family in Far-East Forests. From The Apes: Challenges for the 21st Century. Conference at Brookfield Zoo: Chicago, Il. 28 pgs. link

Galetti, Mauro & Kim McConkey. 1998. Black Hornbill Anthracoceros malayanus following Gibbons in central Borneo. Ibis. 140(4): 686-687.

Geissmann, Thomas. 1986. Mate Change Enhances Duetting Activity in the Siamang Gibbon (Hylobates Syndactulus). Behaviour. 96(1-2):17-27.

Geismann, Thomas. 1999. Duet Songs of the Siamang, Hylobates syndactylus: II. Testing the Pair-Bonding Hypothesis During a Partner Exchange. Behaviour. 136(8): 1005-1039.

Geissmann, Thomas. 2000. Gibbon Song and Human Music from an Evolutionary Perspective. In: The origins of music (Ed.Wallin, N.L., Merker, B., & Brown, S.) MIT Press, 103-123.

Geismann, Thomas. Last Updated Mar. 19, 2002. Gibbon Research Lab. http://www.tiho-hannover.de/gibbons/main/index.html (Accessed Mar. 27, 2002).

Hyatt, Charles W. 1998. Responses of Gibbons (Hylobates lar) to their Mirror Images. American Journal of Primatology. 45(1): 307-311.

Leighton, Donna R. 1987. Gibbons: Territoriality and Monogamy. In: Primate Societies (Ed. Smuts, Barbara B., et al.) The University of Chicago Press, 135-145.

Mitani, John C. 1985. Gibbon Song Duets and Intergroup Spacing. Behaviour. 92(1-2): 59-96.

Mitani, John C. & Peter Marler. 1989. A Phonological Analysis of Male Gibbon Singing Behavior. Behaviour. 109(1-2): 20-45.

Mootnick, Alan R. Last Updated 02/19/02. International Center for Gibbon Studies. (Accessed 03/27/02) http://www.gibboncenter.org/

Palombit, Ryne. 1994. Dynamic Pair Bonds in Hylobatids: Implications regarding monogamous social systems. Behaviour. 128(1-2): 65-101.

Raemaekers, Jeremy J. & Patricia M., & Elliott H. Haimoff. 1984. Loud Calls of the Gibbon (Hylobates lar): Repertoire, Organisation, and Context. Behaviour. 91(1-3): 146-189.

Reichard, Ulrich. 1997. Group Encounters in Wild Gibbons (Hylobates lar): Agonism, Affiliation, and the Concept of Infanticide. Behaviour. 128(1-2): 1135-1174.

Reichard, Ulrich. 1998. Sleeping Sites, Sleeping Places, and Presleep Behavior of Gibbons (Hylobates lar). American Journal of Primatology. 46(1): 35-62.

Van Gulik, R.H. 1967. The Gibbon In China: An Essay in Chinese Animal Lore. E.J. Brill Publishing Co. 123 pp.

Whitten, Anthony J. 1982. A Numerical Analysis of Tropical Rain Forest, Using Floristic and Structural Data, and Its Application to an Analysis of Gibbon Ranging Behaviour. Journal of Ecology. 70(1): 249-271.

Wickler, W. 1980. Vocal Duetting and the Pair Bond. I. Coyness and partner commitment. A Hypothesis. Z. Tierpsychol. 52: (201-209).