Van Amerom, Hendrik W. J., William H. Gillespie, y Robert H. Wagner. 2021. «Daubreeia Pateraeformis (Germar) Zeiller, a Stephanian Sphenopsid from Western Europe and North America». Spanish Journal of Palaeontology 18 (2):159-70. https://doi.org/10.7203/sjp.18.2.21642.