%0 Journal Article %A S. N. Shimanov %T Stability in the critical case of the zero solution for systems with retardation %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1961 %P 152-162 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1961_1_a15/ %G ru %F IVM_1961_1_a15