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@article{MZM_1967_2_1_a7, author = {Bl. Sendov}, title = {Step-function approximations relative to the {Hausdorff} distance}, journal = {Matemati\v{c}eskie zametki}, pages = {61--70}, publisher = {mathdoc}, volume = {2}, number = {1}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1967_2_1_a7/} }
Bl. Sendov. Step-function approximations relative to the Hausdorff distance. Matematičeskie zametki, Tome 2 (1967) no. 1, pp. 61-70. http://geodesic.mathdoc.fr/item/MZM_1967_2_1_a7/