TY - JOUR AU - V. N. Bobochko TI - The de la Vall\'ee-Poussin problem for a~system of singularly perturbed differential equations with unstable spectrum JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1988 SP - 15 EP - 24 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1988_6_a2/ LA - ru ID - IVM_1988_6_a2 ER -