@article{MO_2007_0_a5,
     author = {N. N. Konstantinov},
     title = {On {Elephants,} {Nuts} and {Infinite} {Sums}},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {26--28},
     year = {2007},
     number = {0},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2007_0_a5/}
}