@article{ISU_2012_12_4_a7,
     author = {R. N. Fadeev},
     title = {Necessary and sufficient conditions of belonging to the {Besov--Potapov} classes and {Fourier} coefficients with respect to multiplicative systems},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {41--48},
     publisher = {mathdoc},
     volume = {12},
     number = {4},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ISU_2012_12_4_a7/}
}