Hecker, Maria. 2002. Revision of Orionastraea SMITH, 1917 (Rugosa) from the Lower Carboniferous (uppermost Viséan) of the Moscow Basin, and comnients on patterns of variability, evolution and range of the genus in Eastern Europe and in the British Isles. Coloquios de Paleontología 53, 3–20. Recuperado 6 de diciembre de 2025 a partir de https://revistas.ucm.es/index.php/COPA/article/view/COPA0202110003A