%0 Journal Article %A O. G. Kozlova %A N. V. Belov %T Brazil twins in the light of synthetic quartz crystal morphology %J Doklady Akademii Nauk %D 1980 %P 1397-1399 %V 254 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1980_254_6_a27/ %G ru %F DAN_1980_254_6_a27