1. and in Analytical Methods for Coal and Coal Products, Vol. III, Academic Press, Inc., chapter 49, pp. 357-369 (1979).
2. X-ray Absorption Spectroscopic Investigation of Trace Vanadium Sites in Coal
3. Department of Energy Report, Energy Supply and Demand in the Midterm, DOE/E1A-0102/52 (1979).
4. Report of the World Coal Study, Bellinger Publishing Company, Cambridge, Massachusetts, USA (1980).
5. Principles and Practice of X-ray Spectrometric Analysis, Plenum Press, chapter 12 (1975).