@article{RM_1969_24_1_a11,
     author = {S. V. Bochkarev},
     title = {On series in the {Haar} system},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {24},
     number = {1},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1969_24_1_a11/}
}