↑Pchelintsev [= Pcelincev], V. F. (1951) Semeistva Tylostomidae i Trajanellidae v verkhnem melu Zakavkaz’ia i Srednei Azii. [Families Tylostomidae and Trajanellidae in the late Cretaceous of Transcaucasia and central Asia]. Sbornik Trudov Instituta Geologii i Mineralogii Akademii Nauk Gruzinskoi SSR. (1951): 255 − 282, pls. 1 − 2 (ru)