@article{MZM_1979_25_4_a5,
     author = {L. G. Labsker},
     title = {Korovkin sets in the space of continuous functions for operators of the class~$S_m^0$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {521--536},
     publisher = {mathdoc},
     volume = {25},
     number = {4},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1979_25_4_a5/}
}