1. , , , in: , , (Eds.), Humic Substances II: In Search of Structure, Wiley, New York, 1989, pp. 3-8.
2. , , , in: , , (Eds.), Humic Substances in Soil, Sediment and Water, Wiley, New York, 1985,pp. 1-5.
3. , , , in: (Eds.), Humic Substances: Versatile Components of Plants, Soils and Water, The Royal Society of Chemistry, Cambridge 2000, pp. 299-307.
4. Humus Chemistry: Gen, Comp., Reac., Wiley, New York, 1982.
5. Chemical Model Structures for Soil Organic Matter and Soils