@article{SM_1992_72_2_a4,
     author = {Al. A. Privalov},
     title = {On an orthogonal trigonometric basis},
     journal = {Sbornik. Mathematics},
     pages = {363--372},
     publisher = {mathdoc},
     volume = {72},
     number = {2},
     year = {1992},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1992_72_2_a4/}
}