%0 Journal Article %A S. P. Vyatchanin %T On effective cooling of quantum systems %J Doklady Akademii Nauk %D 1977 %P 1295-1297 %V 234 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1977_234_6_a12/ %G ru %F DAN_1977_234_6_a12