1. Berg, T., R?yset, O., Steinnes, E., and Vadset, M., 1995: Atmospheric trace element deposition: principal component analysis of ICP-MS data from moss samples, Environ. Pollut. 88, 67?77.
2. Buse, A., Norris, D., Harmens, H., B�ker, P., Ashenden, T., and Mills, J., 2003: Heavy metals in European mosses: 2000/2001, Centre for Ecology and Hydrology, Bangor, ISBN: 1870393 70 8, UK, pp. 45.
3. Cheremisina, Y. N., Finkelshtein, M. Y., and Mitrakova, O. V., 1999: Methods of formulation and solution of prediction problems in natural management, Geoinformatika 3, 7?14 (in russian).
4. Ermakova, E. V., Frontasyeva, M. V., and Steinnes, E., 2004: Air pollution studies in Central Russia (Tula region) using the moss biomonitoring technique, NAA and AAS, J. Radioanal. Nucl. Chem. 259, 51?58.
5. Finkelshtein, M. Y., and Deev, K. V., 1999: GIS-INTEGRO a set of tools for development of information system for nature management, Geoinformatika 3, 22?24 (in Russian)