@article{DAN_1957_117_5_a0,
     author = {N. I. Akhiezer and B. Ya. Levin},
     title = {Inequalities for derivatives analogous to {Bernstein{\textquoteright}s} inequality},
     journal = {Doklady Akademii Nauk},
     pages = {735--738},
     publisher = {mathdoc},
     volume = {117},
     number = {5},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1957_117_5_a0/}
}