1. L. A. Serafimov, Doctoral Dissertation in Technical Science (MITKhT, Moscow, 1969).
2. L. A. Serafimov, V. S. Timofeev, and O. V. Utkin, Physico-Chemical Principles of Rectification, Tr. MITKhT, Ed. by S. V. L’vov (MITKhT, Moscow, 1970), p. 4 [in Russian].
3. L. A. Serafimov and V. M. Raeva, Zh. Fiz. Khim. (in press).
4. H. Hopf, Math. Ann. 96, 225 (1926).
5. L. A. Serafimov, Zh. Fiz. Khim. 76, 1351 (2002) [Russ. J. Phys. Chem. A 76, 1211 (2002)].