%0 Journal Article %A Can Zui Bong %T On the question of the invertibility of a~singularly perturbed differential operator with periodic coefficients in the space of almost periodic functions %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1974 %P 97-103 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1974_4_a13/ %G ru %F IVM_1974_4_a13