%0 Journal Article %A V. S. Balitskii %A L. A. Samoilovich %A Yu. A. Belyakova %T The external appearance of quartz crystal vertices, as influenced by the rate of growth of the rhombohedra %J Doklady Akademii Nauk %D 1969 %P 89-92 %V 188 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1969_188_1_a20/ %G ru %F DAN_1969_188_1_a20