1. Afanasjeva, G.A., Revision of the genus Chonetina (Brachiopoda), Paleontol. Zh., 1981, no. 1, pp. 49–53.
2. Ager, D.V., The adaptation of Mesozoic brachiopods to different environments, Palaeogeogr., Palaeoclimatol., Palaeoecol., 1965, vol. 1, no. 2, pp. 143–172.
3. Ager, D.V. and Riggs, E.A., The internal anatomy, shell growth and asymmetry of a Devonian spiriferid, J. Paleontol., 1964, vol. 38, no. 4, pp. 749–760.
4. Asgaard, U., Brachiopod paleoecology in Middle Danian limestones at Fakse, Denmark, Lethaia, 1968, vol. 1, no. 2, pp. 103–121.
5. Atkins, D., The growth stages of the lophophore of the brachiopods Platidia davidsoni (Eudes Deslongchamps) and P. anomioides (Philippi) with notes of the feeding mechanism, J. Mar Boil. Ass. UK, 1959, vol. 38, pp. 103–133.