@article{MO_2017_81_1_a2,
     author = {V. I. Voititskii},
     title = {Summation and hyper-summation of progressions},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {15--26},
     publisher = {mathdoc},
     volume = {81},
     number = {1},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2017_81_1_a2/}
}