%0 Journal Article %A Palata, Jan %T First-order necessary condition for the existence of optimal point in nonlinear programming problem %J Applications of Mathematics %D 1980 %P 257-266 %V 25 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1980.103859/ %R 10.21136/AM.1980.103859 %G en %F 10_21136_AM_1980_103859