FRAAIJE, René H.B.; PENNINGS, Henri W.J. Crab carapaces preserved in nautiloid shells from the Upper Paleocene of Huesca (Pyrenees, Spain). Revista Mexicana de Ciencias Geológicas, [S. l.], v. 23, n. 3, p. 361–363, 2018. Disponível em: https://rmcg.unam.mx/index.php/rmcg/article/view/832. Acesso em: 15 mar. 2025.