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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
♦ ²Seed-Eating by Red Leaf Monkeys (Presbytis rubicunda) in Dipterocarp Forest of Northern Borneo, Glyn Davies, International Journal of Primatology, Vol. 12, No. 2, 1991, pp. 119-144
♦ ³SELECTION AND TREATMENT OF FOOD PLANTS BY WHITE-HANDED GIBBONS (HYLOBATES LAR) IN KHAO YAI NATIONAL PARK, THAILAND, Claudia Whitington and Uthai Treesucon, NAT. HIST. BULL. SIAM SOC. 39: lll-122, 1991