@article{DAN_1975_225_5_a12,
     author = {R. Gabasov and L. E. Zabello and F. M. Kirillova},
     title = {Controllability of linear non-stationary systems},
     journal = {Doklady Akademii Nauk},
     pages = {1035--1037},
     publisher = {mathdoc},
     volume = {225},
     number = {5},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_225_5_a12/}
}