@article{AA_2018_30_4_a2,
     author = {M. A. Komarov},
     title = {On approximation by special differences of simplest fractions},
     journal = {Algebra i analiz},
     pages = {47--60},
     publisher = {mathdoc},
     volume = {30},
     number = {4},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2018_30_4_a2/}
}