%0 Journal Article %A L. A. Boziev %T An estimate of the convergence of the Ritz and least squares methods for certain problems %J Differencialʹnye uravneniâ %D 1977 %P 1873-1875 %V 13 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1977_13_10_a19/ %G ru %F DE_1977_13_10_a19