	Authors	Year	Title
	Becker & Paproth	1993	Auxiliary stratotype sections for the Global Stratotype Section and Point (GSSP) for the Devonian-Carboniferous boundary: Hasselbachtal. Annales de la Société géologique de Belgique, 115: 703-706, 1 fig.
	Oliveira, Horn & Paproth	1979	Preliminary note on the stratigraphy of the Baixo Alentejo Flysch Group, Carboniferous of Southern Portugal and on the palaeogeographic development, compared to corresponding units in Northwest Germ Comunicacoes dos Servicos de Portugal, 65: 151-168, fig.1-5, tab.1-2, pl.1-4; Lisboa.
	Paproth & Streel	1970	Correlations biostratigraphique pres de la limite Devonien/Carbonifère entre les facies littoroux ardennais et les facies bathyaux rhenans. Congr. Coll. Univ. Liège, 55: 365-398, pl.1-3, fig.1-3; Liège.