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♦ ¹The Diversity of Plants as Feed Resources for the Java Gibbon (Hylobates moloch), Grizzled Langur (Presbytis cornata), and Silver Langur (Trachypithecus auratus) In Gunung Halimun National Park, Wartika Rosa Farida and Harun, Jurnal Primatologi Indonesia, Vol. 3, No. 2, Desember 2000, p.:55-61
♦ ²Interactions among Frugivores and Fleshy Fruit Trees in a Philippine Submontane Rainforest, Andreas Hamann and Eberhard Curio, Conservation Biology Volume 13, No. 4, August 1999, Pages 766–773