@article{DAN_1989_304_2_a11,
     author = {Yu. E. Anikonov and B. A. Bubnov},
     title = {Control problems and inverse problems},
     journal = {Doklady Akademii Nauk},
     pages = {309--312},
     year = {1989},
     volume = {304},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_304_2_a11/}
}