%0 Journal Article %A V. M. Gur'yanov %T Approximate solution of boundary value problems for the wave equation %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1980 %P 22-28 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1980_2_a2/ %G ru %F IVM_1980_2_a2