1. Ashton, R., and Steinrauf, L. K. (1970).J. Mol. Biol. 49 547?556.
2. Ben-Hayyim, G., and Krause, G. H. (1980).Arch. Biochem. Biophys. 202 546?557.
3. Cotton, F. A., and Wilkinson, G. (1966).Advanced Inorganic Chemistry, 2nd edn., Interscience (Wiley), New York.
4. Day, M. C., and Selbin, J. (1969).Theoretical Inorganic Chemistry, 2nd edn. Van Norstrand Reinhold, New York.
5. Eisenman, G. (1967). InGlass Electrodes for Hydrogen and Other Cations Eisenman, G., ed.), Marcel Dekker, New York, pp. 268?283.