1. Llandovery conodonts from the Welsh Borderland;Aldridge;Bulletin of the British Museum (Natural History) Geology,1972
2. The stratigraphic distribution of conodonts in the British Silurian;Aldridge;Journal of the Geological Society,1975
3. Conodonts from the Upper Ordovician–Lower Silurian carbonate platform of North Greenland;Armstrong;Grønlands Geologiske Undersøgelse Bulletin,1990
4. Early and Middle Silurian conodonts from midwestern New South Wales;Bischoff;Courier Forschungsinstitut Senckenberg,1986
5. Stratigraphic evidences on Taconican and Guangxian Orogeny;Chen;Journal of Stratigraphy,1996