@article{RM_1964_19_5_a3,
     author = {N. A. Davydov},
     title = {A~sufficient condition for the summability of a~series by the $(\varphi_n)$-method},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {19},
     number = {5},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1964_19_5_a3/}
}