@article{GDZPPN002059223,
title = {An Approximate Reciprocity Formula for Some Exponential Sums.},
journal = {Commentarii mathematici Helvetici},
volume = {43},
year = {1968},
pages = {296-310},
zbl = {0157.09303},
url = {http://dml.mathdoc.fr/item/GDZPPN002059223}
}
Narasimhan, R.; Chandrasekharan, K. An Approximate Reciprocity Formula for Some Exponential Sums.. Commentarii mathematici Helvetici, Tome 43 (1968) pp. 296-310. http://gdmltest.u-ga.fr/item/GDZPPN002059223/