@article{SM_1977_32_1_a1,
     author = {N. S. Vyacheslavov},
     title = {On the least deviations of the function $\operatorname{sign}x$ and its primitives from the rational functions in the $L_p$~metrics, $0<p\leqslant\infty$},
     journal = {Sbornik. Mathematics},
     pages = {19--31},
     publisher = {mathdoc},
     volume = {32},
     number = {1},
     year = {1977},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1977_32_1_a1/}
}