@article{ISU_2009_9_1_a1,
     author = {A. L. Lukashov and S. V. Tyshkevich},
     title = {Extremal rational functions on several arcs of the unit circle with zeros on these arcs},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {8--13},
     publisher = {mathdoc},
     volume = {9},
     number = {1},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ISU_2009_9_1_a1/}
}