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 air-borne matter;Askne;Atmospheric Environment,1972
3. Air-borne particles: Black and white episodes;Brosset;Ambio,1976
4. A method of measuring airborne acidity: Its application for the determination of acid content on long-distance transported particles and in drainage water from spruces;Brosset,1976
5. Determination of the equivalence point in potentiometric titrations;Gran;Analyst,1952