^Lower Silurian Conodonts from Kentucky. E. B. Branson and C. C. Branson, Journal of Paleontology, Vol. 21, No. 6 (Nov., 1947), pages 549-556 (Stable URL retrieved 29 April 2016)
Early Silurian Conodonts from the Quinton Formation of the Broken River Region (North-Eastern Australia). Andrew Simpson (pdf
^Local variations in the distribution of Silurian conodonts of the Distomodus kentuckyensis Zone of the Oslo Region, Norway. MB Idris, Norsk geologisk tidsskrift, 1984