@article{DAN_1984_275_5_a4,
     author = {A. L. Volberg},
     title = {Denseness of polynomials on a system of rays},
     journal = {Doklady Akademii Nauk},
     pages = {1049--1055},
     publisher = {mathdoc},
     volume = {275},
     number = {5},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_275_5_a4/}
}