@article{DE_1986_22_9_a11,
     author = {V. F. Butuzov and T. A. Urazgil'dina},
     title = {A singularly perturbed system of equations of elliptic type in the critical case},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1565--1576},
     publisher = {mathdoc},
     volume = {22},
     number = {9},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_9_a11/}
}