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Hohmann, G (1991) Comparative Analyses of Age- and Sex-Specific Patterns of Vocal Behaviour in Four Species of Old World Monkeys. In: Folia Primatologica, 56 (3). pp. 133-156.
Hohmann, G (1989) Comparative Study of Vocal Communication in Two Asian Leaf Monkeys, Presbytis johnii and Presbytis entellus. In: Folia Primatologica, 52 (1-2). pp. 27-57.
Hohmann, G (1988) Analysis of Loud Calls Provides New Evidence for Hybridization between Two Asian Leaf Monkeys (Presbytis johnii, Presbytis entellus). In: Folia Primatologica, 51 (4). pp. 209-213.