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♦ 1VARIATIONS IN SPINDLE EUONYMUS EUROPAEUS CONSUMPTION BY FRUGIVOROUS BIRDS DURING THE FRUITING SEASON, Ángel HERNÁNDEZ, Ardeola 50(2), 2003, 171-180
♦ 2Recruitment of a Mast-Fruiting, Bird-Dispersed Tree: Bridging Frugivore Activity and Seedling Establishment, Carlos M. Herrera, Pedro Jordano, Luis López-Soria, Juan A. Amat, Ecological Monographs, 64(3), 1994, pp. 315-344
♦ 3Ecology of Commanster♦ 4Birds and berries: a study of an ecological interaction. Calton, Great
Britain, Snow B.K., Snow D.W., 1988, T & AD Poyser. 268 p.