@article{DAN_1975_224_5_a7,
     author = {E. S. Levitin},
     title = {On the local perturbation theory of a problem of mathematical programming in a {Banach} space},
     journal = {Doklady Akademii Nauk},
     pages = {1020--1023},
     publisher = {mathdoc},
     volume = {224},
     number = {5},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_224_5_a7/}
}