%0 Journal Article %A S. B. Norkin %T On a boundary problem of Sturm-Liouville type for a second-order differential equation with a retarded argument %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1958 %P 203-214 %N 6 %U http://geodesic.mathdoc.fr/item/IVM_1958_6_a19/ %G ru %F IVM_1958_6_a19