@article{IVM_1991_4_a1,
     author = {P. P. Zabreiko and V. I. Nazarov},
     title = {Smoothness of solutions of linear differential equations in {Banach} spaces},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {9--16},
     publisher = {mathdoc},
     number = {4},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1991_4_a1/}
}