1. Afanasjeva, G.A., Directions and methods of morphological studies of brachiopods, in Tr. Paleontol. Inst. Inst. Akad. Nauk (Trans. Paleontol. Inst. USSR Acad. Sci.), 1984, vol. 199, pp. 10–19.
2. Afanasjeva, G.A., Brachiopods of the order Chonetida (historical development, functional morphology, phylogeny and system), in Tr. Paleontol. Inst. Inst. Akad. Nauk (Trans. Paleontol. Inst. USSR Acad. Sci.), 1988, vol. 228, pp. 1–124.
3. Afanasjeva. G.A., Superfamily Syringothyroidea, Devonian and Carboniferous brachiopods and Biostratigraphy of Transcaucasia (Ending), Paleontol. J., 2018, vol. 52, no. 9, pp. 1023–1025.
4. Barskov, I.S., Structural and biochemical aspects of the study of the external skeleton of invertebrates, in Tez. Dokl. III Vsesoyuz. Konf. po mezozoyskim i kaynozoyskim brakhiopodam (Proc. III All-Union. Conf. on Mesozoic and Cenozoic Brachiopods), Kharkov: Kharkiv. Univ., 1977, pp. 7–9.
5. Belyakova, O.N., On the method of studying the punctation and fibrous layer of the shells of the articulate brachiopods, Paleontol. Zh., 1990, no. 3, pp. 91–99.