Seddon, M.B., Aparicio, M.-T. & Holyoak, D.T. (1994). Taxonomy of five species of Helicopsis (Helicopsis) from Morocco (Gastropoda: Helicoidea). Journal of Conchology, 35: 55-66. London.
297853
Seddon, M.B., Aparicio, M.-T. & Holyoak, D.T.
1994
Taxonomy of five species of Helicopsis (Helicopsis) from Morocco (Gastropoda: Helicoidea)