Andersen, 1990 (syst.); Damgaard, 2005 (genetics, tax.); Murray & Giller, 1990 (biol.); Vepsäläinen & Nummelin, 1985a (biol.); Zimmermann & Scholl, 1993 (geogr. var.).
Distribution
Rosenzweig, 1995b (Byelorussia); Protić, 1998a (Serbia); Cianferoni, 2011 (Sardinia); Heckmann et al., 2015 (Crete).