@article{INTD_1991_39_a2,
     author = {A. I. Tret'yak},
     title = {Higher-order pointwise optimality conditions},
     journal = {Itogi Nauki i Tekhniki. Seriya Sovremennye Problemy Matematiki. Noveishie Dostizheniya},
     pages = {118--177},
     publisher = {mathdoc},
     volume = {39},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTD_1991_39_a2/}
}