%0 Journal Article %A V. P. Sakhnenko %T Ferroelastic twinning of crystal surfaces %J Doklady Akademii Nauk %D 1989 %P 103-107 %V 306 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1989_306_1_a22/ %G ru %F DAN_1989_306_1_a22