A. Van Loon, «The stratigraphy of the Westphalian C around Prioro (prov. León. Spain) (with Paleontological Notes by G.E. de Groot, H.W.J. van Amerom and R.H. Wagner)», Trab. Geol., vol. 3, n.º 3, pp. 231–267, dic. 1971.