1. A. L. Liberman, O. V. Bragin, and B. A. Kazanskii, Izv. AN SSSR, Otd. Khim. N.,1961, 525.
2. A. L. Liberman, T. V. Lapshina, and B. A. Kazanskii, Dokl. AN SSSR,105, 727 (1955), A. L. Liberman, O. V. Bragin, and B. A. Kazanskii, Izv. AN SSSR, Otd. Khim. N.,1959, 879; B. A. Kazanskii, A. L. Liberman, I. M. Kuznetsova, V. T. Aleksanyan, Kh. E. Sterin, and G. V. Loza, Dokl. AN SSSR,133, 364 (1960).
3. P. Sabatier and G. Gandion, Compt. rend.,165, 224 (1917); A. Mailhe, and F. Godon, J. Pharm. Chem. (7),16, 225 (1917); Bull. Soc. chim. (4),21, 288 (1913); Compt. rend.,165, 557 (1917);166, 996 (1918); G. Mignonac, Ann. chim. (11),2, 225 (1934); A. F. Platé, M. E. Vol'pin, E. A. Reformatskaya, and S. V. Zotova, Zh. obshch. khimii,26, 684 (1956); A. A. Balandin and N. A. Vasyunina, Dokl. AN SSSR,105, 981 (1955).
4. G. Zubey, C. E. Johnson, and T. D. Nevitt, US Pat. 2849478 (1958); Chem. Abstrs.,53, 3063 (1959); K. Bauer, K. Vierling, and K. Wimmer, German Pat. 730179 (1942); Chem. Abstrs.,38, 3804 (1944); J. F. Olin, US Pat. 2388218 (1945); Chem. Abstrs.,40, 5913 (1946); K. E. Marple, T. W. Evans, and B. Borders, British Pat. 570835 (1945); Chem. Abstrs.,40, 57703 (1946); B. Thomson, US Pat. 2731488 (1956); Chem. Abstrs.,50, 12097 (1956).
5. Tadeusz Lesiak, Roczniki chemii,36, 1107 (1962).