@article{DAN_1963_151_6_a9,
     author = {J. I. Mamedkhanov},
     title = {Certain extremum problems in the class of polynomials and rational functions},
     journal = {Doklady Akademii Nauk},
     pages = {1277--1279},
     publisher = {mathdoc},
     volume = {151},
     number = {6},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_151_6_a9/}
}