1. Adriano D.C. 2001. Trace Elements in the Terrestrial Environments: Biogeochemistry, Bioavailability and Risks of Metals. 2nd edn. Springer, New York.
2. Alewell C., Lischeid G., Hell U. and Manderscheid B. High temporal resolution of ion fluxes in semi-natural ecosystems?Gain of information or waste of resources? Biogeochemistry in-press.
3. Allen G.A., Radojevic M. and Harrison R.M. 1988. Atmospheric speciation and wet deposition of alkyllead compounds. Environ. Sci. Technol. 22: 517?522.
4. Arnaudov V., Pavlova M. and Arnaudov R. 1977. Lead distribution in the granitic rocks from south Bulgaria and the problem of their affinity. Geol. Balcan. 7: 85?98.
5. Arnold C.G., Ciani A., Müller S.R., Amirbaman A. and Schwarzenbach R.P. 1998. Association of triorganotin compounds with dissolved humic acids. Environ. Sci. Technol. 32: 2976?2983.