1. Description of some typical fossils of the Shellrock Stage;Belanski;Am. Midl. Nat.,1928
2. Correlation of the North American Silurian rocks;Berry;Geol. Soc. Am., Spec. Pap.,1970
3. On some of the fossils of the Gospé series of rocks;Billings;Geol. Surv. Can., Paleozoic. Fossils,1874
4. Papiliophyllum lissingenense n. sp. (Rugosa) aus dem Lissinger Schurfgraben (Emsium; Eifel). Senckenb;Birenheide;Lethaea,1974
5. Silurian and Devonian of the northern Appalachians;Boucot,1968