@article{LJM_2001_9_a4,
     author = {A. V. Kazantsev},
     title = {On a~problem of {Polya} and {Szeg\H} o},
     journal = {Lobachevskii journal of mathematics},
     pages = {37--46},
     publisher = {mathdoc},
     volume = {9},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/LJM_2001_9_a4/}
}