@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/