Taxon - Odkazy a literatura
de Jong, Y.S.D.M. (ed.): Fauna Europaea 2.4 [http://www.faunaeur.org] [jako Ancyla holtzi Friese, 1902]Datum citace: 9. březen 2012
Ruggiero M. (ed) (2008): World Bee Checklist [http://www.itis.gov/beechecklist.html], ITIS [jako Ancyla holtzi Friese, 1902]Datum citace: 10. duben 2010