Itano, Wayne M., y Christopher J. Duffin. «An Enigmatic Chondrichthyan Spine from the Visean of Indiana, USA That Resembles a Median Rostral Cartilage of Squaloraja (Holocephali, Chimaeriformes)». Spanish Journal of Palaeontology 38, no. 1 (junio 20, 2023): 57–68. Accedido noviembre 13, 2024. https://pasquin.uv.es/index.php/sjpalaeontology/article/view/26305.