KNIGHT, John A; WAGNER, Robert H. Sphenopteris hadrophylla knight ms, a possible discopteris, from the Upper Stephanian of NW Spain. Spanish Journal of Palaeontology, [S. l.], v. 27, n. 1, p. 45–66, 2020. DOI: 10.7203/sjp.27.1.18096. Disponível em: https://turia.uv.es/index.php/sjpalaeontology/article/view/18096. Acesso em: 20 sep. 2024.