%0 Journal Article %A G. A. Chechkin %T Averaging of boundary value problems with a~singular perturbation of the~boundary conditions %J Sbornik. Mathematics %D 1994 %P 191-222 %V 79 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1994_79_1_a12/ %G en %F SM_1994_79_1_a12