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@article{MZM_1988_44_1_a6, author = {V. I. Ivanov}, title = {Approximation in $L_p$ by means of piecewise-constant functions}, journal = {Matemati\v{c}eskie zametki}, pages = {64--79}, publisher = {mathdoc}, volume = {44}, number = {1}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1988_44_1_a6/} }
V. I. Ivanov. Approximation in $L_p$ by means of piecewise-constant functions. Matematičeskie zametki, Tome 44 (1988) no. 1, pp. 64-79. http://geodesic.mathdoc.fr/item/MZM_1988_44_1_a6/