@article{SM_1973_20_1_a7,
     author = {A. M. Olevskii},
     title = {An~example of an orthonormal system of convergence in~$C$ but not in~$L^2$},
     journal = {Sbornik. Mathematics},
     pages = {145--153},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {1973},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1973_20_1_a7/}
}