%0 Journal Article %A V. F. Butuzov %A A. G. Nikitin %T An angular boundary layer in the asymptotics of the solution of a singularly perturbed system of equations of elliptic type %J Differencialʹnye uravneniâ %D 1988 %P 343-345 %V 24 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1988_24_2_a20/ %G ru %F DE_1988_24_2_a20