@article{IVM_1996_5_a11,
     author = {S. Ya. Serovaǐskiǐ},
     title = {Extremal problems on differentiable submanifolds of a {Banach} space},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {83--86},
     year = {1996},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1996_5_a11/}
}