@article{IM2_2009_73_3_a2,
     author = {M. V. Balashov and G. E. Ivanov},
     title = {Weakly convex and proximally smooth sets in {Banach} spaces},
     journal = {Izvestiya. Mathematics },
     pages = {455--499},
     publisher = {mathdoc},
     volume = {73},
     number = {3},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2009_73_3_a2/}
}