@article{SM_1984_49_2_a7,
     author = {A. N. Zhdanov and E. A. Sevast'yanov},
     title = {Approximation and differential properties of measurable sets},
     journal = {Sbornik. Mathematics},
     pages = {401--418},
     publisher = {mathdoc},
     volume = {49},
     number = {2},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1984_49_2_a7/}
}