%0 Journal Article %A S. I. Repin %T A~posteriori error estimates for approximate solutions of variational problems with power growtn functionals %J Zapiski Nauchnykh Seminarov POMI %D 1997 %P 244-255 %V 249 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1997_249_a11/ %G en %F ZNSL_1997_249_a11