1. Ager D. V. 1963. Principles of Paleoecology: An Introduction to the study of how and where Animals and Plants lived in the Past. McGraw-hill, New York, xi+371 pp.
2. Ausich W. I. 1997. Regional encrinites: a vanished lithofacies. In: Brett C. E. Baird G. C. (eds) Paleontological Events: Stratigraphic, Ecological, and Evolutionary Implications. Columbia University Press, New York, 509–519.
3. Bathymetry on a Carboniferous reef
4. A revised correlation of Silurian rocks in the British Isles;Cocks;Geological Society, London, Special Report,1992
5. Dodd J. R. Stanton R. J. Jr. 1981. Paleoecology, Concepts and Applications. Wiley-Interscience, New York, xiv+559 pp.