Martínez-Pérez, C., Valenzuela-Ríos, J., Navas-Parejo, P., Liao, J.-C., & Botella, H. (2011). Emsian (Lower Devonian) Polygnathids (Conodont) succession in the Spanish Central Pyrenees. Journal of Iberian Geology, 37(1), 45-64. https://doi.org/10.5209/rev_JIGE.2011.v37.n1.4