@article{ZVMMF_1981_21_3_a12,
     author = {V. F. Butuzov and Yu. P. Udodov},
     title = {Asymptotic solution of a system of singularly perturbed equations of elliptic type with angular boundary layer},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {665--677},
     publisher = {mathdoc},
     volume = {21},
     number = {3},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1981_21_3_a12/}
}