%0 Journal Article %A V. R. Petukhov %T Functional perturbations of asymptotically and tangentially-asymptotically stable positions of equilibrium %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1966 %P 93-97 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1966_2_a12/ %G ru %F IVM_1966_2_a12