%0 Journal Article %A D. I. Pekelis %T A function that describes the boundaries of the change of dimension of operator kernels of Noether families %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1988 %P 78 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1988_3_a15/ %G ru %F IVM_1988_3_a15