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Dupont, Y L; Hansen, D M; Rasmussen, J T; Olesen, J M (2004). Evolutionary changes in nectar sugar composition associated with switches between bird and insect pollination: the Canarian bird-flower element revisited. Functional Ecology, 18(5):670-676.
Dupont, Y L; Hansen, D M; Valido, A; Olesen, J M (2004). Impact of introduced honey bees on native pollination interactions of the endemic Echium wildpretii (Boraginaceae) on Tenerife, Canary Islands. Biological Conservation, 118(3):301-311.
Dupont, Y L; Hansen, D M; Valido, A; Olesen, J M (2004). Introduced honeybees on islands: impacts on native pollination interactions. Ecologia Mediterranea, 30(2):236-237.
Dupont, Y L; Hansen, D M; Olesen, J M (2003). Structure of a plant–flower-visitor network in the high-altitude sub-alpine desert of Tenerife, Canary Islands. Ecography, 26(3):301-310.
Valido, A; Dupont, Y L; Hansen, D M (2002). Native birds and insects, and introduced honey bees visiting Echium wildpretii (Boraginaceae) in the Canary Islands. Acta Oecologica, 23(6):413-419.