@article{DAN_1963_148_4_a0,
     author = {I. A. Bakhtin},
     title = {Optimal values and points of a non-linear function},
     journal = {Doklady Akademii Nauk},
     pages = {741--744},
     publisher = {mathdoc},
     volume = {148},
     number = {4},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_148_4_a0/}
}