@article{GDZPPN002259397, title = {Zur Theorie der Gau\ss schen Summen}, journal = {Mathematische Annalen}, volume = {56}, year = {1903}, pages = {554-567}, zbl = {34.0228.01}, url = {http://dml.mathdoc.fr/item/GDZPPN002259397} }
Lerch, M. Zur Theorie der Gaußschen Summen. Mathematische Annalen, Tome 56 (1903) pp. 554-567. http://gdmltest.u-ga.fr/item/GDZPPN002259397/