1. V. F. Petrenko and I. A. Ryzhkin, Fiz. Iverd. Tela,26, 2681 (1984).
2. P. Pissis, G. Boudouris, J. C. Garson, and J. L. Leveque, Z. Naturforsch,A36, 321 (1981).
3. P. Sixou and A. Jeneveau, Physics and Chemistry of Ice, Ottawa (1973).
4. H. Engelhardt and N. Riehl, Phys. Lett.,14, 20 (1965).
5. J. S. Chamberlain and N. H. Fletcher, Phys. Kondens. Mater.,12, 193 (1971).