@article{DAN_1963_150_2_a3,
     author = {Yu. V. Egorov},
     title = {Optimal control in a {Banach} space},
     journal = {Doklady Akademii Nauk},
     pages = {241--244},
     publisher = {mathdoc},
     volume = {150},
     number = {2},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_150_2_a3/}
}