Sepúlveda, A., Liñan, E., Chirivella, J. B., Gámez Vintaned, J. A., & Gozalo, R. (2022). Biostratigraphy of the Ribota and Huérmeda formations (Cambrian Series 2) in the Comarca del Aranda (Zaragoza province), Iberian Chains (NE Spain). Spanish Journal of Palaeontology, 37(1), 101–122. https://doi.org/10.7203/sjp.24492