1. Evolution of the Northern Belt, Southern Uplands: implications for the Southern Uplands controversy
2. Some new fossils from the Girvan district;BEGG;Transactions of the Glasgow Geological Society,1946
3. Biostratigraphic and Biogeographic Significance of Middle and Upper Ordovician Conodonts in the Girvan Succession, South-West Scotland;BERGSTRÖM;Courier Forschungsinstitut Senckenberg,1990
4. BERGSTRÖM S. M. ORCHARD M. J. 1985. Conodonts of the Cambrian and Ordovician Systems from the British Isles. In Higgins A. C. Austin R. L. (eds.), A Stratigraphical Index of Conodonts, 32–67. Ellis Horwood.
5. BEYRICH E. 1845. Ueber einige böhmische Trilobiten. G. Relmer, Berlin.