@article{MZM_1977_21_3_a3,
     author = {V. G. Doronin and A. A. Ligun},
     title = {The best one-sided approximation of the classes $W^rH_\omega$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {313--327},
     publisher = {mathdoc},
     volume = {21},
     number = {3},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1977_21_3_a3/}
}