1. N. N. Menshutkin, J. Russ. Phys. Chem. Soc. 11, 345 (1879); 12, 82 (1880); 14, 114 (1882).
2. M. D. Tilicheev, J. Russ. Chem. Soc. 57, 143 (1925).
3. H. Dostal and R. Raff, Monatsh. 68, 188 (1936).
4. B. V. Maksorov, in The Collection ?Questions of Insulation in Electrotechnics,? Goskhimizdat, Moscow and Leningrad, 1930, p. 128. [In Russian].
5. S. S. Al'tman and V. V. Kedrinskii, in The Collection ?Cracking and the Chemical Processing of Cracking Products,? No. 3, 1936, p. 364. [In Russian].