1. J. Heyrovský and J. Babicka,Collect. Czech. Chem. Commun.2, 370 (1930).
2. E. Cohn and J. Edsal,Proteins, Amino Acids, and Peptides as Ions and Dipolar Ions, Reinhold Publishing Corporation, New York (1942).
3. H. Berg,Biochem. Z.329, 274 (1957).
4. H. Berg, in Topics inBioelectrochemistry and Bioenergetics, Vol 1, G. Milazzo, ed., J. Wiley, London (1976), pp. 39–104.
5. E. Paleček,Naturwiss. 45, 186 (1958).