1. Identification of wild grass and cereal pollen;Andersen;Danmarks Geologiske Undersøgelse Årbog,1979
2. Pollen analyses from early Bronze Age barrows in Thy;Andersen;Journal of Danish Archaeology,1997
3. A Practical Pollen Guide to the British Flora;Andrew,1981
4. Anthropogenic Indicators in Pollen Diagrams;Behre,1986
5. Annotated Catalogue of Pollen and Pteridophyte Spore Types;Bennett,1994