1. Ebing W (1979) Monitoring of plants and soil for analysis of possibly hazardous contaminants and banking of these environmental specimens, in: Luepke N-P (ed) Monitoring environmental materials and specimen Banking. Martinus Nijhoff Publishers, Den Haag Boston London, pp 203–210
2. Ebing W, Hoffmann G (1975) Fresenius Z Anal Chem 275:11–13
3. Gigas E (1962) Vermessungstechn Rundsch Heft 9:329–334