@article{DAN_1961_137_2_a10,
     author = {B. S. Stechkin and S. B. Stechkin},
     title = {Quadratic mean and arithmetic mean},
     journal = {Doklady Akademii Nauk},
     pages = {287--290},
     publisher = {mathdoc},
     volume = {137},
     number = {2},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_137_2_a10/}
}