@article{DAN_1960_134_4_a9,
     author = {A. G. Butkovskiy and A. Ya. Lerner},
     title = {Optimal control systems with distributed parameters},
     journal = {Doklady Akademii Nauk},
     pages = {778--781},
     publisher = {mathdoc},
     volume = {134},
     number = {4},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_134_4_a9/}
}