@article{DAN_1957_113_2_a2,
     author = {Yu. S. Bogdanov},
     title = {Lyapunov{\textquoteright}s norms in linear spaces},
     journal = {Doklady Akademii Nauk},
     pages = {255--257},
     publisher = {mathdoc},
     volume = {113},
     number = {2},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1957_113_2_a2/}
}