@article{MZM_1984_35_3_a4,
     author = {A. G. Babenko},
     title = {An extremal problem for polynomials},
     journal = {Matemati\v{c}eskie zametki},
     pages = {349--356},
     publisher = {mathdoc},
     volume = {35},
     number = {3},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1984_35_3_a4/}
}