@article{DE_2003_39_5_a11,
     author = {I. K. Lifanov and L. N. Poltavskii},
     title = {Spaces of {Fractional} {Quotients} of {Periodic} {Functions}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {687--709},
     publisher = {mathdoc},
     volume = {39},
     number = {5},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2003_39_5_a11/}
}