Taxon - Links and literature
Galli C.: WMSDB - Wolrdwide Mollusc Species Data Base July 10, 2013 [http://www.bagniliggia.it/WMSD/WMSDhome....] [as Oxychilus investigatus Riedel, 1993]Data retrieved on: 23 November 2013
de Jong, Y.S.D.M. (ed.): Fauna Europaea 2.4 [http://www.faunaeur.org] [as Schistophallus investigatus (Riedel, 1993)]Data retrieved on: 9 March 2012
Irikov A., Eröss Z. (2008): An Updated and Annotated Checklist of Bulgarian Terrestrial Gastropods (Mollusca: Gastropoda), Folia Malacologica, Vol. 16(4) [as Oxychilus investigatus Riedel, 1993]Data retrieved on: 22 February 2009