@article{DAN_1988_299_4_a11,
     author = {N. A. Sokolov},
     title = {Complexity of optimization on independent systems},
     journal = {Doklady Akademii Nauk},
     pages = {821--824},
     publisher = {mathdoc},
     volume = {299},
     number = {4},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1988_299_4_a11/}
}