@article{RM_1989_44_3_a31,
     author = {N. N. Danilov and N. N. Kozik and N. K. Smolentsev},
     title = {All-Union {School} {{\textquotedblleft}Optimal} {Control.} {Geometry} and {Analysis{\textquotedblright}}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1989},
     volume = {44},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1989_44_3_a31/}
}