%0 Journal Article %A S. A. Nazarov %T Finite-dimensional approximations to the Poincar\'e--Steklov operator for general elliptic boundary value problems in domains with cylindrical and periodic exits to infinity %J Trudy Moskovskogo matematičeskogo obŝestva %D 2019 %P 1-62 %V 80 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MMO_2019_80_1_a0/ %G ru %F MMO_2019_80_1_a0