Wagner, Robert H, y Carmen Álvarez-Vázquez. 2021. «A Revision of the Lower Pennsylvanian Alethopteris Lonchitica (auctorum) and Its Identity With Alethopteris Urophylla». Spanish Journal of Palaeontology 23 (2):157-92. https://doi.org/10.7203/sjp.23.2.20404.