1. Bodenkundliche Kartieranleitung;Bodenkunde,1982
2. Lipid composition of humus;Andreyev;Soviel Soil Science,1981
3. A rapid method of total lipid extraction and purification;Bligh;Canadian Journal of Biochemistry and Physiology,1959
4. Fats, waxes and resins in soil;Braids,1975
5. Lipid fraction in forest litter: early stages of decomposition;Bridson;Soil Biology & Biochemistry,1985