M. L. Martínez Chacón y C. F. Winkler Prins, «Isogramma Meek & Worthe, 1870 (Dictyonellida, Brachiopoda) from the Pennsylvanian of the Cantabrian Mountains (N Spain)», Spanish J. Palaeontol., vol. 31, n.º 1, pp. 115–129, abr. 2020.