Air pollution by ozone in Europe in summer 2003 overview of exceedances of EC ozone threshold values during the summer season April-August 2003 and comparisons with previous years - Fiala, Jaroslav (Office for Official Publications of the European Communities, 2003)
Report to the European Commission by the European Environment Agency, European Topic Centre on Air and Climate Change based on data provided in the framework of Council Directive 92/72/EEC on air pollution by ozone by 15 September 2003