R. C.  Moore, Hill, D., and Wells, J. W., ?Glossary of morphological terms applied to corals?, in Treatise on Invertebrate Paleontology. Part F: Coelenterata, Lawrence, Kansas: Geological Society of America and University of Kansas Press, 1956, pp. 245?251.

W. H.  Bryan and Hill, D., ?Spherulitic crystallization as a mechanism of skeletal growth in the hexacorals?, Proceedings of the Royal Society of Queensland, vol. 52, pp. 78?91, 1941.