@article{IVM_2011_5_a8,
     author = {V. Sh. Tsagareishvili},
     title = {Functional conditions for the convergence of {Fourier} series with respect to general orthonormal systems},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {68--74},
     publisher = {mathdoc},
     number = {5},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2011_5_a8/}
}