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2. B.N. Deloné, et al.: Dokl. Akad. Nauk SSSR 209, 25 (1974)
3. B.N. Deloné, R.V. Galiulin, M.I. Shtogrin: Teoriya Brave i ee obobschcheniye na trekhmernyje reshotki (Bravai’ theory and its generalization for three-dimensional lattices), in Bravé O. Izbrannye trudy ( 0. Bravais’ selected works) (Nauka, Leningrad 1974 ) p. 333 (in Russian)
4. B.N. Delon, M.I. Shtogrin: Dokl. Akad. Nauk SSSR 219, 95 (1974)
5. M.I. Shtogrin: Tr. Mat. Inst. Akad. Nauk SSSR 213, 3 (1973)