@article{IVM_1964_4_a5,
     author = {S. P. Geǐsberg},
     title = {On the absolute summability of gap series by the {Riemann} met},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {39--46},
     publisher = {mathdoc},
     number = {4},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1964_4_a5/}
}