@article{1077472100, author = {Bellman, Richard}, title = {Convergence of non-harmonic Fourier series}, journal = {Duke Math. J.}, volume = {10}, number = {1}, year = {1943}, pages = { 551-552}, language = {en}, url = {http://dml.mathdoc.fr/item/1077472100} }
Bellman, Richard. Convergence of non-harmonic Fourier series. Duke Math. J., Tome 10 (1943) no. 1, pp. 551-552. http://gdmltest.u-ga.fr/item/1077472100/