@article{10_14708_cm_v54i2_704,
     author = {E.J. Ibrahimov},
     title = {On {Fourier} coefficients of some classes of functions and their applications in approximation theory},
     journal = {Commentationes Mathematicae},
     pages = { 209--246},
     publisher = {mathdoc},
     volume = {54},
     number = {2},
     year = {2014},
     doi = {10.14708/cm.v54i2.704},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v54i2.704/}
}