@article{GDZPPN002077426, title = {A property of the Unitary Analogue of Ramanujan's Sum.}, journal = {Elemente der Mathematik}, volume = {25}, year = {1970}, pages = {114-114}, zbl = {0201.04801}, url = {http://dml.mathdoc.fr/item/GDZPPN002077426} }
Suryanarayana, D. A property of the Unitary Analogue of Ramanujan's Sum.. Elemente der Mathematik, Tome 25 (1970) p. 114. http://gdmltest.u-ga.fr/item/GDZPPN002077426/