%0 Journal Article %A A. N. Tikhonov %T Ill-posed problems of optimal planning and stable methods for their solution %J Doklady Akademii Nauk %D 1965 %P 507-510 %V 164 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1965_164_3_a7/ %G ru %F DAN_1965_164_3_a7