1. R. M. Brydone, Further Notes on New or Imperfectly Known Chalk Polyzoa, Part 1 (Dulau, London, 1929), pp. 1–38.
2. F. Canu and R. S. Bassler, “North American Early Tertiary Bryozoa,” Bull. U.S. Natl. Mus., No. 106, 1–879 (1920).
3. F. Canu and R. S. Bassler, “Studies on the Cyclostomatous Bryozoa,” Proc. U.S. Natl. Mus. Wash. 61 (Art. 22), 1–154 (1922).
4. F. Canu and R. S. Bassler, “Studies on the Cyclostomatous Bryozoa,” Proc. U.S. Natl. Mus. Wash. 67 (Art. 21), 1–124 (1926).
5. P. A. Gerasimov, Index Fossils of the Mesozoic of the Central Regions of the European Part of the USSR: Part II. Echinodermata, Crustacea, Vermes, Bryozoa, and Anthozoa of the Jurassic Deposits (Gosgeoltekhizdat, Moscow, 1955) [in Russian].