@article{MZM_1997_61_1_a8,
     author = {S. B. Stechkin},
     title = {Farey sequences},
     journal = {Matemati\v{c}eskie zametki},
     pages = {91--113},
     year = {1997},
     volume = {61},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1997_61_1_a8/}
}