Dagys, A.S. (1972). Postembrional'noe razvitie brakhidiia pozdnepaleozoiskikh i rannemezozoiskikh Terebratulida [Postembryonic development of brachidia of Late Paleozoic and Early Mesozoic Terebratulides]. Morfologicheskie i Filogeneticheskie Voprosy Paleontologii. 112: 22-58.
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Dagys, A.S.
1972
Postembrional'noe razvitie brakhidiia pozdnepaleozoiskikh i rannemezozoiskikh Terebratulida [Postembryonic development of brachidia of Late Paleozoic and Early Mesozoic Terebratulides]
Morfologicheskie i Filogeneticheskie Voprosy Paleontologii