@article{ZNSL_1983_126_a5,
     author = {A. L. Vol'berg},
     title = {Weighted density of polynomials on the line for strongly non-symmetric weights},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {47--54},
     year = {1983},
     volume = {126},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1983_126_a5/}
}