@article{CM_1940__7__253_0, author = {Zaanen, A. C.}, title = {On some orthogonal systems of functions}, journal = {Compositio Mathematica}, pages = {253--282}, publisher = {Johnson Reprint Corporation}, volume = {7}, year = {1940}, zbl = {0022.14104}, language = {en}, url = {www.numdam.org/item/CM_1940__7__253_0/} }
Zaanen, A. C. On some orthogonal systems of functions. Compositio Mathematica, Tome 7 (1940) , pp. 253-282. http://www.numdam.org/item/CM_1940__7__253_0/