%0 Journal Article %A S. P. Novikov %T Critical points and level surfaces of multivalued functions %J Informatics and Automation %D 1984 %P 201-209 %V 166 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1984_166_a14/ %G ru %F TRSPY_1984_166_a14