1. Wedepohl KH. Springer Verlag, Berlin-Heidelbrg-New York, 1968-1979
2. The chemistry of weathering D;Drever,1985
3. Tardy Y. Mémoires du service géol. d'Alsace et de Lorraine, no31, Strasbourg, 1969
4. Mosser C. ULP Strasbourg, Institut de géologie, Mémoire no63, 1980, 227p
5. Oden S Proceedings of the first international symposium on acid precipitation and the forest ecosystem, Dochinger L. S.T.A. Seliga, USDA Forest service general technical report, 1976, 1–36