@article{SM_1972_18_4_a7,
     author = {N. M. Korobov},
     title = {On~the distribution of digits in periodic fractions},
     journal = {Sbornik. Mathematics},
     pages = {659--676},
     publisher = {mathdoc},
     volume = {18},
     number = {4},
     year = {1972},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1972_18_4_a7/}
}