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♦ 1Effectiveness of Dispersal of an Ornithocorous Cactus Myrtillocactus geometrizans (Cactaceae) in a Patchy Environment, Mónica G. Pérez-Villafaña and Alfonso Valiente-Banuet, The Open Biology Journal, 2009, 2, 101-113
♦ 2THE ROLE OF SEED DISPERSERS IN THE POPULATION DYNAMICS OF THE COLUMNAR CACTUS NEOBUXBAUMIA TETETZO, HÉCTOR GODÍNEZ-ALVAREZ, ALFONSO VALIENTE-BANUET, AND ALBERTO ROJAS-MARTÍNEZ, Ecology, 83(9), 2002, pp. 2617-2629