Rodríguez, S., Sando, W. J. y Kullman, J. (1986) «Utility of corals for biostratigraphic and zoogeographic analysis of the Carboniferous in the Cantabrian Mountains, Northern Spain», Trabajos de Geología, 16(16), pp. 37–61. doi: 10.17811/tdg.16.1986.37-61.