1. H. O. Albrecht, Z. Phys. Chem., 136, 321 (1928).
2. E. H. White, “A Symposium on Light and Life”, W. D. McElroy and B. Glass, Ed., The John Hopkins Press, Baltimore, Md., 1961, p. 183.
3. F. McCapra, Quart. Rev., 20, 485 (1966).
4. A. K. Babko and N. M. Lukovskaya, Zh. Anal. Khim., 17, 50 (1962).
5. A. K. Babko and L. I. Dubovenko, Z. Anal. Chem., 200, 428 (1964).