@article{KYB_2011_47_2_a3,
     author = {Antczak, Tadeusz},
     title = {Saddle points criteria via a second order $\eta $-approximation approach for nonlinear mathematical programming involving second order invex functions},
     journal = {Kybernetika},
     pages = {222--240},
     year = {2011},
     volume = {47},
     number = {2},
     mrnumber = {2828574},
     zbl = {1242.90171},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_2011_47_2_a3/}
}