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@article{MZM_1985_37_1_a3, author = {A. P. Petukhov}, title = {Approximation of discontinuous functions in the {Hausdorff} metric}, journal = {Matemati\v{c}eskie zametki}, pages = {25--40}, publisher = {mathdoc}, volume = {37}, number = {1}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1985_37_1_a3/} }
A. P. Petukhov. Approximation of discontinuous functions in the Hausdorff metric. Matematičeskie zametki, Tome 37 (1985) no. 1, pp. 25-40. http://geodesic.mathdoc.fr/item/MZM_1985_37_1_a3/