1. Baker, R. R., Beitr. Tabakforsch., 8, 124 (1975).
2. Grove, D. M., Porous Carbon Solids (edit. by Bond, R. L.), ch. 4 (Academic, London, 1967).
3. Baker, R. R., High temp. Sci., 7, 236 (1975).
4. Handbook of Chemistry and Physics (edit. by Weast, R. C.), 56th edn, F56–F59 (Chemical Rubber Company, Cleveland, Ohio, 1975–76).
5. Matthews, G. P., Thomas, C. M. S. R., Duffy, A. N., and Smith, E. G., J. chem. Soc., Faraday I, 72, 238 (1976).