1. EEA (European Environmental Agency). (2006). European forest types – Categories and types for sustainable forest management reporting and policy. EEA Report 9. Office for Official Publications of the Communities, Luxembourg. 111 pp.
2. Gschwantner, T., Schadauer, K., Vidal, C., Lanz, A., Tomppo, E., di Cosmo, L., Robert, N., Englert Duursma, D., & Lawrence, M. (2009). Common tree definitions for national forest inventories in Europe. Silva Fennica, 43 (2), 303–321.
3. ICP Forests (International Co-operative Programme on Assessment and Monitoring of Air Pollution Effects on Forests). (2009). Code lists vascular plants. Version Nov 2009. Expert panel on ground vegetation and biodiversity. Available on-line at
http://www.icp-forests.org/EPbiodiv.htm
. Last accessed Dec 2009.
4. Lanz, A., Alberdi, I., Barbati, A., Barsoum, N., Brändli, U-B., Chirici, G., Cienciala, E., Di Cosmo, L., Freudenschuss, A., Gabler, K., Gschwantner, T., Hylen, G., Ilvesniemi, H., Kusar, G., Kändler, G., Lawrence, M., McRoberts, R. E., Nabuurs, G-. J., Petersson, H., Priwitzer, T., Robert, N., Rondeux, J., Schadauer, K., Ståhl, G., Tomter, S., Tomppo, E., Tosi, V., Weiss, P., & Winter, S. (2009). Harmonization of national forest inventories in Europe. Reference definitions. Manuscript.
5. Tomppo, E., Gschwantner, T., Lawrence, M., & McRoberts, R. E. (Ed.). (2010). National forest inventories: pathways for harmonised reporting. Heidelberg, Springer.