1. Method of determining strong acid in precipitation based on coulometric titration with application of Gran's plot;Askne,1973
2. Determination of strong acid in precipitation, lake-water and airborne matter;Askne;Atmospheric Environment,1972
3. Determination of low molecular weight volatile fatty acids in aqueous samples;Barcelona;Analyt. Chem.,1980
4. A method of measuring airborne acidity: Its application for the determination of acid contingent on long-distance transported particles and in drainage water from spruces;Brosset,1976
5. A method for evaluating the acid-base balance in natural waters;Brosset;Wat. Air Soil Pollut.,1980