@article{DAN_1966_168_4_a10,
     author = {S. Ya. Yakubov},
     title = {The {Cauchy} problem for differential equations of the second order in a {Banach} space},
     journal = {Doklady Akademii Nauk},
     pages = {759--762},
     publisher = {mathdoc},
     volume = {168},
     number = {4},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_168_4_a10/}
}