	Authors	Year	Title
	Chlupac	1976	The oldest goniatite faunas and their stratigraphical significance. Lethaia, 9: 303-315, fig.1-6; Oslo.
	Chlupac & Turek	1983	Devonian goniatites from the Barrandian area, Czechoslovakia. Rozpravy Ustredniho ustavu geologického, 46: 1-159, fig.1-30, pl.1-32; Praha.