@article{GDZPPN002041847,
title = {On a signed cosine equation of N summands.},
journal = {Aequationes mathematicae},
volume = {52},
year = {1996},
pages = {294-302},
zbl = {0858.39012},
url = {http://dml.mathdoc.fr/item/GDZPPN002041847}
}
Stetkaer, Henrik. On a signed cosine equation of N summands.. Aequationes mathematicae, Tome 52 (1996) pp. 294-302. http://gdmltest.u-ga.fr/item/GDZPPN002041847/