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♦ 1Feeding and General Activity Patterns of a Howler Monkey (Alouatta palliata) Troop Living in a Forest Fragment at Los Tuxtlas, Mexico, Alejandro Estrada, Saúl Juan-Solano, Teresita Ortíz Martínez and Rosamond Coates-Estrada, American Journal of Primatology 48:167-183 (1999)
♦ 2"Fig-eating by vertebrate frugivores: a global review", MIKE SHANAHAN, SAMSON SO, STEPHEN G. COMPTON and RICHARD CORLETT, Biol. Rev. (2001), 76, pp. 529572