1. Tropospheric ozone in the European Union;Beck,1999
2. Photochemical oxidant modelling in Europe: multi-annual modelling and source receptor relationships;Simpson,1997
3. 5EAP. The Community Programme of Policy and Action in Relation to the Environment and Sustainable Development (The 5th Environment Action Programme). Official Journal of the European Communities (OJ), C 138, 17.5.1993, p. 1. Amended by European Parliament and Council Decision of 24 September 1998, OJ L 275, 10.10.98, p. 1
4. UN/ECE. Updated Maps of Critical Loads, Uncertainties and Exceedances. Document EB.AIR.WG.1/1998/5, United Nations Economic Commission for Europe, Geneva, 1998.
5. WHO. Air Quality Guidelines for Europe. 2nd Edition. World Health Organisation, Regional Office for Europe. Copenhagen, in press, 1999.