TY - JOUR AU - Can Zui Bong TI - On the question of the invertibility of a~singularly perturbed differential operator with periodic coefficients in the space of almost periodic functions JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1974 SP - 97 EP - 103 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1974_4_a13/ LA - ru ID - IVM_1974_4_a13 ER -