Pollinating Flies (Diptera): A major contribution to plant diversity and agricultural production Ssymank, Axel ; Kearns, C. A. ; Pape, Thomas ; Thompson, F. Christian Abstract Publication: Biodiversity Pub Date: April 2008 DOI: 10.1080/14888386.2008.9712892 Bibcode: 2008Biodi...9a..86S