1. Some investigations of the heterojunctions in AIVBIV systems
2. S.K. Peneva, R.K. Rudarska, D.D. Nihtianova and I.Z. Kostadinov, presented at 6th Intern. Conf. on Crystal Growth (ICCG-6), Moscow, 1980, and other papers given at the Conference.
3. K.A. Vlassov, The Periodic Low and the Isomophism (Institute of Mineralogy and Geochemistry, Moscow) (in Russian).