Статья 2082 T. Hakobyan V. Harutyunyan E. Hakhverdyan V. Gevorkyan V. Grigoryan V. Makhov PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE 171 623-629 1999 http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1862-6319/homepage/2231_ed…