@article{MZM_1977_22_3_a4,
     author = {V. G. Doronin and A. A. Ligun},
     title = {Best-possible one-sided approximations in the classes $W_\alpha^rV$ ($r>-1$) by trigonometric polynomials in the metric of $L_1$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {357--370},
     publisher = {mathdoc},
     volume = {22},
     number = {3},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1977_22_3_a4/}
}