%0 Journal Article %A Van Tun %T Asymptotic formulae for the solutions of boundary value problems for a general elliptic equation of the second order with discontinuous coefficients %J Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki %D 1964 %P 577-580 %V 4 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZVMMF_1964_4_3_a20/ %G ru %F ZVMMF_1964_4_3_a20