J.  Castillejo and Wiktor, A., ?Furcopenis gen. n. with its two new species and a new Deroceras species from Spain (Gastropoda, Pulmonata, Agriolimacidae)?, Malakologische Abhandlungen, vol. 9, pp. 1-15, 1983.

A.  Wiktor, ?Agriolimacidae (Gastropoda: Pulmonata - A systematic monograph?, Annales Zoologici, vol. 49, pp. 347-590, 2000.

?Fauna Europaea?, 2008.