@article{MZM_1977_22_2_a9,
     author = {V. G. Doronin and A. A. Ligun},
     title = {Upper bounds of best one-sided approximations of the classes $W^rL_\psi$ in the metric of~$L$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {257--268},
     publisher = {mathdoc},
     volume = {22},
     number = {2},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1977_22_2_a9/}
}