@article{CRMATH_2011__349_7-8_455_0,
     author = {Bednorz, Witold},
     title = {On the convergence of orthogonal series},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {455--458},
     publisher = {Elsevier},
     volume = {349},
     number = {7-8},
     year = {2011},
     doi = {10.1016/j.crma.2011.02.001},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2011.02.001/}
}