%0 Journal Article %A V. G. Korneev %T Simple algorithms for calculation of the classical a posteriori error estimates of numerical solutions of elliptic equations %J Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki %D 2011 %P 11-27 %V 153 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZKU_2011_153_4_a1/ %G ru %F UZKU_2011_153_4_a1