%0 Journal Article %A V. I. Bujakas %T Multi-mirror controllable surfaces %J Doklady Akademii Nauk %D 1990 %P 54-58 %V 311 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1990_311_1_a10/ %G ru %F DAN_1990_311_1_a10