@article{JRAM_1969__238_183516,
     author = {Syed A. Husain},
     title = {On uniform convergence factors of orthonormal expansions of functions of class {L...} .},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {217--220},
     publisher = {mathdoc},
     volume = {238},
     year = {1969},
     zbl = {0175.35601},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1969__238_183516/}
}