G. Meléndez, K. Page, J. Bello, and J. Ramajo, “Callovian and the Callovian - Oxfordian transition sedimentary record in NE Iberian Chain: Taphonomic analysis and palaeogeography”, JIGE, vol. 33, no. 2, pp. 261–282, Jan. 2007, Accessed: Nov. 23, 2024. Available: https://revistas.ucm.es/index.php/JIGE/article/view/JIGE0707210261A