1. Peabody Museum Bulletin;K. R. Adams,1998
2. Armitage, P. L., 1975, The extraction and identification of opal phytoliths from the teeth of ungulates. Journal of Archaeological Science 2:187–97.
3. Baker, G., 1959, Fossil opal-phytoliths and phytolith nomenclature. Australian Journal of Science 21:300–306.
4. Bannister, B., 1969, Dendrochronology. In Science in Archaeology, a Survey of Progress and Research, 2nd ed., edited by D. Brothwell and E. Higgs, pp. 191–205. Thames & Hudson, Leipzig.
5. Barker, G., 1985, Prehistoric Farming in Europe. Cambridge University Press, Cambridge.