@article{DE_1983_19_11_a26,
     author = {S. A. Nefedov},
     title = {On the theory of controllability of systems with distributed parameters},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1998--2001},
     publisher = {mathdoc},
     volume = {19},
     number = {11},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_11_a26/}
}