1. L. Pauling, H. Springall, and K. Palmer, J. Am. Chem. Soc.61, 927 (1939).
2. M. F. Mamotenko, Collection of Papers on Physical Chemistry [in Russian] (1947) p. 5.
3. L. Pauling, The Nature of the Chemical Bond (New York, 1944) p. 215.
4. C. Coulson and V. Henri, Memorial Volume, Desoer Liege (1948) p. 15.
5. V. M. Tatevskii, Vestnik Moskov. Univ.10, 53 (1950).