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2. Aldridge, R.J., 1976. Comparison of macrofossil communities and conodont distribution in the British Silurian. In: Barnes, C.R. (Ed.), Conodont paleoecology. Geological Association of Canada, Special Paper 15, pp. 91–104.
3. Aldridge, R.J., Mabillard, J.E., 1981. Local variations in the distribution of Silurian conodonts: an example from the amorphognathoides interval of the Welsh Basin. Microfossils from Recent and Fossil Shelf Seas. Ellis Horwood, Chichester, pp. 10–17.
4. Ecological specialists among Silurian conodonts;Aldridge;Palaeontol. Assoc. Spec. Papers Palaeontol.,1984
5. Conodonts from the Upper Ordovician-Lower Silurian carbonate platform of north Greenland;Armstrong;Grønlands geologiske undersøgelse,1990