1. Real-time measurement and interpretation of the conductivity and pH of precipitation samples;Beverland;Water, Air and Soil Pollution,1997
2. EN 27888, 1994. Water quality. Determination of electrical conductivity.
3. EN ISO 10304-1, 1995. Water quality. Determination of dissolved fluoride, chloride, nitrite, orthophosphate, bromide, nitrate and sulphate ions, using liquid chromatography of ions. Part 1: method for water with low contamination.
4. European Monitoring and Evaluation Programme, 1996. EMEP Manual for sampling and chemical analysis. EMEP/CCC-Report 1/95, Kjeller, Norwegian Institute for Air Research.
5. Study of anion stability in rain. Aqueous organic acids and mineral anions temporal evolutions during an urban rainy event;Ferrari;Analusis,1996