@article{IM2_1987_28_3_a2,
     author = {L. S. Kazarin},
     title = {On a~problem of {Sz\'ep}},
     journal = {Izvestiya. Mathematics },
     pages = {467--495},
     publisher = {mathdoc},
     volume = {28},
     number = {3},
     year = {1987},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1987_28_3_a2/}
}