Álvarez-Vázquez, Carmen, y Christopher J Cleal. 2020. «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 (1):5-24. https://doi.org/10.7203/sjp.31.1.17119.