1. Andersson, P., R. Löfvendahl & G. Åberg, 1990. Major element chemistry, ?2H, ?18O and 87Sr/86Sr in a snow profile across central Scandinavia. Atmos. Environ. 24A: 2601?2608.
2. Arnason, B., 1976. Groundwater systems in Iceland traced by deuterium. Societas Scientiarum Islandica. No. 42: 236 pp.
3. Berner, R. A. 1971. Principles of Chemical Sedimentology. McGraw-Hill. 240 pp.
4. Burgman, J. O., E. Eriksson, L. Kostov & F. Westman, 1981. Oxygen-18 variation in monthly precipitation over Sweden. Division of Hydrol. Dept. of Physical Geography, Uppsala Univ. 39 pp.
5. Caron, F., A. Tessier, J. R. Kramer, H. P. Schwarcz & C. E. Rees, 1986. Sulfur and oxygen isotopes of sulfate in precipitation and lakewater, Quebec, Canada. Appl. Geochem. 1: 601?606.