@article{GDZPPN002080869, title = {A result for the 'other' variable of Ramanujan's sum.}, journal = {Elemente der Mathematik}, volume = {38}, year = {1983}, pages = {122-124}, zbl = {0516.10002}, url = {http://dml.mathdoc.fr/item/GDZPPN002080869} }
Johnson, Kenneth R. A result for the 'other' variable of Ramanujan's sum.. Elemente der Mathematik, Tome 38 (1983) pp. 122-124. http://gdmltest.u-ga.fr/item/GDZPPN002080869/