@article{SM_1975_27_3_a5, author = {S. V. Bochkarev}, title = {A~Fourier series in an arbitrary bounded orthonormal system that diverges on a~set of positive measure}, journal = {Sbornik. Mathematics}, pages = {393--405}, publisher = {mathdoc}, volume = {27}, number = {3}, year = {1975}, language = {en}, url = {http://geodesic.mathdoc.fr/item/SM_1975_27_3_a5/} }