@article{DAN_1994_339_4_a7,
     author = {R. Gabasov and F. M. Kirillova and O. I. Kostyukova},
     title = {Optimal positional observation of linear systems},
     journal = {Doklady Akademii Nauk},
     pages = {461--464},
     year = {1994},
     volume = {339},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1994_339_4_a7/}
}