1. Baily W. H. (1871) in Explanatory Memoir to accompany Sheets 49, 50 and Part of 61 of the Maps of the Geological Survey of Ireland including the Country around Downpatrick, and the shores of Dundrum Bay and Strangford Lough, County of Down, Palaeontological remarks, eds Traill W. A. Egan F. W. (Alexander Thom, Dublin and London), pp 22–23.
2. Barrande J. (1850) Graptolites de Bohême (Prague).
3. Towards a ‘Common Language’ in stratigraphy;Bassett;Episodes,1985
4. Bassett M. G. Rickards R. B. Warren P. T. (1975) The type Wenlock Series, Report of the Institute of Geological Sciences, 75/13.
5. The construction of graptolite rhabdosomes in the light of ultrastructural studies;Bates;Indian Journal of Geology,1987