%0 Journal Article %A L. D. Popov %T About accuracy of the solution of internal subproblems in the Hestenes--Powell method %J Trudy Instituta matematiki i mehaniki %D 1998 %P 381-386 %V 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/TIMM_1998_5_a25/ %G ru %F TIMM_1998_5_a25