Ramovs, A. (1971). Connections of the Upper Carboniferous brachiopod faunas from the Carnic Alps and Karavanke Mountains with those of the Cantabrian Mountains (Spain) ROMANO, M. - A new Proetid trílobite from the Lower Westphalían of North-west Spain. Trabajos De Geología, 4(4), 373–385. https://doi.org/10.17811/tdg.4.1971.373-385