1967 Geographic Variation in the Hoolock or White-browed Gibbon. Folia Primat. 7:276-283.
Description of Hylobates hoolock leuconedys new subspecies.
1968 The Classification of the Gibbons (Primates, Pongidae). Z.f. Saugetierk. 33:239-246.
Establishes that Concolor-group gibbons are at least as distinct, morphologically, from the others as are the Siamangs, so that a third subgenus or genus (Nomascus) has to be recognised in addition to Hylobates and Symphalangus.
1968 A New Subspecies of Gibbon from Northern Thailand. Proc. Biol. Soc. Wash. 81:625-8.
Description of Hylobates lar carpenteri new subspecies.
1969 Hylobates lar (Linneaus, 1771), H. entelloides (I. Geoffroy St. Hilaire, 1842) and H. Hoolock (Harlan, 1834), (Mammalia Pongidae): proposal to place these names on the official list of specific names in Zoology. Bull. Zool. Nomen. 25:162-4.
1971 Geographic and individual variation in Bornean Gibbons, with remarks on the systematics of the subgenus Hylobates. Folia Primat. 14:139-153.
All Bornean gibbons belong to a single species and subspecies, Hylobates lar muelleri. - It appears that some mislabelling, and poor cleaning of specimens, misled me into missing both the distinctiveness of albibarbis and the geographic variation in the rest.
1972 Systematics and Phylogeny of Gibbons. In D. Rumbaugh (ed) Gibbon and Siamang, 1:1-89. Karger, Basel.
1976 (with P. Andrews). Gibbons and Brachiation. In D.Rumbaugh (ed) Gibbon and Siamang 4:167-218. Karger, Basel
1976 The Apes. Dyn 3:29-36.
1977 Hylobates lar (Linnaeus, 1771), H. entelloides (I. Geoffroy St. Hilaire, 1842) and H. Hoolock (Harlan, 1834), (Mammalia, Hylobatidae): proposal to place these names on the Official List of Specific Names in Zoology. Bull. Zool. Nomencl. 34:75-9.
1977 Sima syndactyla Raffles, 1821 (Mammalia: Hylobatidae); proposal to give this name precedence over Sima gibbon, C. Miller, 1779. Bull. Zool. Nomencl. 34:104-5.
1978 Comments on the application concerning Simia syndactyla, Raffles 1821 (Mammalia: Hylobatidae). Bull. Zool. Nomencl. 35:76.
1984 A new look at the taxonomy and phylogeny of the gibbons. In H.Preuschoft et al.(ed) The Lesser Apes 542-561.
1988 (with V. Weitzel and C.M. Yang) A Catalogue of Primates in the Singapore Zoological Reference Collection. Special Number, Raffles Bulletin of Zoology (Vol. 36).
Red-cheeked Gibbon (Nomascus gabriellae), Hongkong Botanical Gardens
1993 Speciation in Living Hominoid Primates. In W. H. Kimbel and L. B. Martin (eds.), Species, Species Concepts and Primate Evolution. New York: Plenum Press.
1997 Taxonomy and phylogeny of Primates. In A.Blancher, J.Klein & W.W.Socha (eds.), Molecular Biology and Evolution of Blood Group and MHC Antigens in Primates. Berlin: Springer Verlag, Berlin Heidelberg and New York, pp.3-23.
2001 Primate Taxonomy. Washington: Smithsonian Institution Press.
Patzi, a female gibbon from northeastern Vietnam, that lived in Tierpark Berlin from 1962 to 1986. She was described and discussed by Geissmann (1989, Int.J.Primat., 10:455-476). She may have belonged to Nomascus concolor nasutus (see Groves, 2001)