1. H. Helmholtz and W. Abhandl, Physik. Tech. Reichsanst Alt. 1, 925 (1879).
2. A. Gouy, Ann, Chim. Phys. 29, 145 (1903); Compt. ReNd. 149, 654 (1909).
3. D. L. Chapman, Phil. Mag. 25, 475 (1913).
4. O. Stern, Z. Electrochem. 30, 508 (1924).
5. O. A. Esin and B. F. Markov, Zh. Fiz. Khim. 13, 318 (1939).