1. A. I. Shlygin and M. E. Manzhelei, Uch. Zap. Kishinevsk. Univ., 8:13 (1953).
2. T. O. Pavela, Ann. Acad. Sci. Fennicae, Ser. A, II, No. 59 (1954).
3. A. I. Shlygin, Proceedings of the Third Conference on Electrochemistry [in Russian], Izd. Akad. Nauk SSSR (1953), p. 322.
4. G. P. Khomchenko and G. D. Vovchenko, Vestn. Mosk. Gos. Univ., Ser, Estestv. Nauk, No. 8, 91 (1955).
5. Yu. A. Podvyazkin and A. I. Shlygin, Zh. Fiz. Khim., 30:1521 (1956).