%0 Journal Article %A B. I. Birman %A B. L. Timan %T An analysis of conditions for the appearance of varied distribution of impurities in crystals in the case of directional crystallization %J Doklady Akademii Nauk %D 1965 %P 78-80 %V 161 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1965_161_1_a20/ %G ru %F DAN_1965_161_1_a20