%0 Journal Article %A N. I. Kazeeva %T An investigation of the stabiity of systems of difference equations with constant coefficients in the critical case of one root equal to unity %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1970 %P 31-36 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1970_10_a3/ %G ru %F IVM_1970_10_a3