1. Alcamo, J., Shaw. R. and Hordijk, L. (Eds): 1991,The RAINS Model of Acidification. Kluwer, Amsterdam.
2. Baldi, M. and Calori, G.: 1995,Tropospheric Ozone: A data base for Europe and statistical analysis. WP-95-xxx. International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria.
3. Caliandro, B.: 1994,Control Technology Options and Costs for Reducing Volatile Organic Compounds. WP-94-80. International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria.
4. Fuhrer, J. and Achermann, B. (Eds): 1994,Critical Levels for Ozone, a UN-ECE workshop report. Swiss Federal Research Station for Agricultural Chemistry and Environmental Hygiene, Liebefeld-Bern, Switzerland.
5. Heyes, C. and Sch�pp, W.: 1995,Towards a simplified model to describe ozone formation in Europe. WP-95-34. International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria.