@article{VMUMM_2002_4_a11,
     author = {S. A. Stepanyants},
     title = {Summability of series with gaps},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {60--63},
     publisher = {mathdoc},
     number = {4},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2002_4_a11/}
}