Pidal, Raimundo. «A Lower Devonian (Emsian) Species of the Genus Bactrocrinites (crinoidea): Bactrocrinites Robustus N. Sp. (Cantabrian Mountains, NW Spain)». Spanish Journal of Palaeontology 23, no. 2 (febrero 14, 2021): 267–271. Accedido noviembre 10, 2024. https://pasquin.uv.es/index.php/sjpalaeontology/article/view/20411.