Authors	Year	Title
Figge	1968	A Goniatite fauna from the Visean/Namurian boundary. Palaeontology, 11: 264-274, fig.1-2, pl.46,47; London.
Weyer	1975	Biostratigraphie des Magdeburg-Flechtinger Kulms. Zeitschrift für geologische Wissenschaften, 3 (1975,5): 547-589, fig.1-17, tab.1, pl.1-8; Berlin.
Yates	1961	New Namurian goniatites of the genus Eumorphoceras. Palaeontology, 4: 54-58, pl.6; London.