@article{DE_1971_7_12_a3,
     author = {Yu. N. Kiselev},
     title = {A linear problem of time-optimality in the case of analytic perturbations of the initial conditions},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2151--2160},
     publisher = {mathdoc},
     volume = {7},
     number = {12},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1971_7_12_a3/}
}