%0 Journal Article
%A A. F. Izmailov
%T Some generalizations of the Morse lemma
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1998
%P 142-156
%V 220
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TM_1998_220_a8/
%G ru
%F TM_1998_220_a8