%0 Journal Article %A V. N. Gorbuzov %T Boundedness criteria for the number of possible compact hypersurfaces determined by differential systems %J Differencialʹnye uravneniâ %D 1999 %P 30-37 %V 35 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1999_35_1_a4/ %G ru %F DE_1999_35_1_a4