	Authors	Year	Title
	Korn	1997	The Palaeozoic ammonoids of the South Portuguese Zone. Memórias do Instituto geológico e Mineiro 33: 1-131, 69 text-figs., 16 pls., Lisboa.
	Oliveira, Horn & Kullmann	1985	The stratigraphy of the Upper Devonian and Carboniferous sediments of Southwest Portugal. [J.T.Oliveira, M.Horn, J.Kullmann & E.Paproth]. Compte Rendu 10. Congr. intert. Stratigraph. Géol. Carbonifère Madrid 1983: 107-120, fig.1-6; Madrid.