Taxon - Odkazy a literatura
Rhophitulus friesei Ducke, 1907 Ruggiero M. (ed) (2008): World Bee Checklist [http://www.itis.gov/beechecklist.html], ITIS [jako Rhophitulus friesei Ducke, 1907]Datum citace: 10. duben 2010
Rhophitulus friesei Ducke, 1907 Ruggiero M. (ed) (2008): World Bee Checklist [http://www.itis.gov/beechecklist.html], ITIS [jako Rhophitulus friesei Ducke, 1907]