Chrysosyrphus nigripennis (Swedish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Chrysosyrphus nigripennis" in Swedish language version.

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catalogueoflife.org

Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D. (red.) (23 december 2011). ”Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist.”. Species 2000: Reading, UK. http://www.catalogueoflife.org/annual-checklist/2011/search/all/key/chrysosyrphus+nigripennis/match/1. Läst 24 september 2012.