@article{1077476006, author = {Bellman, Richard}, title = {Ramanujan sums and the average value of arithmetic functions}, journal = {Duke Math. J.}, volume = {17}, number = {1}, year = {1950}, pages = { 159-168}, language = {en}, url = {http://dml.mathdoc.fr/item/1077476006} }
Bellman, Richard. Ramanujan sums and the average value of arithmetic functions. Duke Math. J., Tome 17 (1950) no. 1, pp. 159-168. http://gdmltest.u-ga.fr/item/1077476006/