@article{DAN_1987_292_1_a5,
     author = {I. S. Litvinchev},
     title = {Decomposition for nonseparable extremal problems},
     journal = {Doklady Akademii Nauk},
     pages = {33--36},
     publisher = {mathdoc},
     volume = {292},
     number = {1},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_292_1_a5/}
}