@article{DAN_1967_177_1_a4,
     author = {V. F. Dem'yanov},
     title = {Successive approximations for finding saddle points},
     journal = {Doklady Akademii Nauk},
     pages = {21--24},
     publisher = {mathdoc},
     volume = {177},
     number = {1},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_177_1_a4/}
}