Pello, J., y I. Corrales. 1971. «Characteristics of the Sedimentation of Early Westphalian D Rocks Near the North-Western Border of the Central Asturian Coalfield (Cordillera Cantábrica)». Trabajos De Geología 4 (4):365-73. https://doi.org/10.17811/tdg.4.1971.365-373.