@article{1077469163,
author = {Sugunamma, M.},
title = {Eckford Cohen's generalizations of Ramanujan's
trigonometrical sum $C(n,r)$},
journal = {Duke Math. J.},
volume = {27},
number = {1},
year = {1960},
pages = { 323-330},
language = {en},
url = {http://dml.mathdoc.fr/item/1077469163}
}
Sugunamma, M. Eckford Cohen’s generalizations of Ramanujan’s
trigonometrical sum $C(n,r)$. Duke Math. J., Tome 27 (1960) no. 1, pp. 323-330. http://gdmltest.u-ga.fr/item/1077469163/