@article{ZNSL_2016_445_a0,
     author = {M. V. Babushkin and V. V. Zhuk},
     title = {Growth of norms in $L_2$ of derivatives of {Steklov} functions and properties of functions defined by best approximations and {Fourier} coefficients},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {5--32},
     publisher = {mathdoc},
     volume = {445},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2016_445_a0/}
}