Sepúlveda, A.; Liñan, E.; Chirivella, J. B.; Gámez Vintaned, J. A.; Gozalo, R. Biostratigraphy of the Ribota and Huérmeda Formations (Cambrian Series 2) in the Comarca Del Aranda (Zaragoza province), Iberian Chains (NE Spain). Spanish J. Palaeontol. 2022, 37, 101-122.