Álvarez-Vázquez, Carmen, y Christopher J Cleal. «Wagneropteris Minima, a New Medullosalean Pteridosperm from the Middle Westphalian (Middle Plennsylvanian) of the Peñarroya-Belmez-Espiel Coalfield (Córdoba Province, SW Spain)». Spanish Journal of Palaeontology 31, no. 1 (abril 25, 2020): 5–24. Accedido diciembre 7, 2024. https://turia.uv.es/index.php/sjpalaeontology/article/view/17119.