@article{ZNSL_1971_22_a23,
     author = {M. I. Shirokov},
     title = {On the uniform approximation of functions on closed sets without angular points},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {209--211},
     year = {1971},
     volume = {22},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1971_22_a23/}
}