1. Lake acidification in Norway - present and predicted status;Henriksen;Ambio,1988
2. Chemistry of small Norwegian lakes, with special reference to acid precipitation;Wright;Limnol. Oceanogr.,1978
3. Changes in soil acidity in two forest areas with different acid deposition: 1920s to 1980s;Tamm;Ambio,1988
4. Hanssen, J.E., J.P. Rambaek, A. Semb and E. Steinnes. 1981. Atmospheric deposition of some heavy metals in Norway. Proceedings, Heavy Metals in the Environment, Amsterdam, The Netherlands, September 15-18, 1981, pp. 322-325.
5. Trace elements in the atmospheric environment;Peirson;Nature,1973