@article{ZNSL_1994_215_a13,
     author = {Yu. V. Netrusov},
     title = {An intrinsic description of functions defined on a~plane convex domain and having a~prescribed order approximation by algebraic polynomials},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {217--225},
     publisher = {mathdoc},
     volume = {215},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1994_215_a13/}
}