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♦ ¹"Fig-eating by vertebrate frugivores: a global review", MIKE SHANAHAN, SAMSON SO, STEPHEN G. COMPTON and RICHARD CORLETT, Biol. Rev. (2001), 76, pp. 529–572
♦ ²OBSERVATIONS OF FRUGIVOROUS BIRDS AT FRUIT-BEARING PLANTS IN THE NORTH NEGROS FOREST RESERVE, PHILIPPINES, Martin Heindl & Eberhard Curio, ECOTROPICA 5: 167-181, 1999
♦ ³The 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