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♦ 1Pollination networks of oil-flowers: a tiny world within the smallest of all worlds, Bezerra, Elisângela L.S.; Machado, Isabel C.; Mello, Marco A. R., Journal of Animal Ecology, Volume 78, Number 5, September 2009 , pp. 1096-1101(6)
♦ 2OIL-COLLECTING BEES AND RELATED PLANTS: A REVIEW OF THE STUDIES IN THE LAST TWENTY YEARS AND CASE HISTORIES OF PLANTS OCCURRING IN NE BRAZIL, Isabel Cristina Machado, Solitary Bees Conservation, Rearing and Management for Pollination, International Workshop on Solitary Bees and Their Role in Pollination, held in Beberibe, Ceará, Brazil, in April 2004, pp. 255-280