%0 Journal Article %A S. E. Pastukhova %T Tartar's method of compensated compactness in averaging the~spectrum of a~mixed problem for an~elliptic equation in a~perforated domain with third boundary condition %J Sbornik. Mathematics %D 1995 %P 753-770 %V 186 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1995_186_5_a7/ %G en %F SM_1995_186_5_a7