@article{10_21136_AM_1980_103859,
     author = {Palata, Jan},
     title = {First-order necessary condition for the existence of optimal point in nonlinear programming problem},
     journal = {Applications of Mathematics},
     pages = {257--266},
     publisher = {mathdoc},
     volume = {25},
     number = {4},
     year = {1980},
     doi = {10.21136/AM.1980.103859},
     mrnumber = {0583586},
     zbl = {0439.90082},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.1980.103859/}
}