Work found, with species-group names introduced therein:
Fretter, V. and A. Graham. 1980. The prosobranch molluscs of Britain and Denmark. Part 5--Marine Littorinacea. Journal of Molluscan Studies, Supplement 7 243-284. [Stated date: -- Aug 1980.] Littorina mariae beeensis, see Littorina fabalis (Turton, 1825)