Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1981__36_141258, author = {Aleksandr Grytczuk}, title = {An identity involving {Ramanujan's} sum.}, journal = {Elemente der Mathematik}, pages = {16--24}, publisher = {mathdoc}, volume = {36}, year = {1981}, zbl = {0447.10009}, url = {http://geodesic.mathdoc.fr/item/ELMA_1981__36_141258/} }
Aleksandr Grytczuk. An identity involving Ramanujan's sum.. Elemente der Mathematik, Tome 36 (1981), pp. 16-24. http://geodesic.mathdoc.fr/item/ELMA_1981__36_141258/