%0 Journal Article %A G. I. Shishkin %T Grid approximation of a~wave equation singularly perturbed with respect to the space variable %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 2001 %P 67-81 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_2001_1_a6/ %G ru %F IVM_2001_1_a6