1. Boehm HP. In: Eley DD, Pines H, Weisz PB, editors. Advances in catalysis, vol. 16. New York: Academic Press, 1966:179.
2. Surface Functional Groups on Carbon and Silica
3. Steenberg B. Adsorption and exchange of ions on activated charcoal. Uppsala: Almquist and Wiksells, 1944.
4. Surface Oxides of Carbon