TY - JOUR AU - V. F. Butuzov AU - V. M. Mamonov TI - A singularly perturbed boundary value problem of elliptic type in the critical case JO - Differencialʹnye uravneniâ PY - 1982 SP - 1056 EP - 1061 VL - 18 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1982_18_6_a15/ LA - ru ID - DE_1982_18_6_a15 ER -