@article{GDZPPN002417642, title = {The Number of Solutions of x3 = 1 in a 3-Group.}, journal = {Mathematische Zeitschrift}, volume = {147}, year = {1976}, pages = {43-46}, zbl = {0314.20020}, url = {http://dml.mathdoc.fr/item/GDZPPN002417642} }
Laffey, Thomas J. The Number of Solutions of x3 = 1 in a 3-Group.. Mathematische Zeitschrift, Tome 147 (1976) pp. 43-46. http://gdmltest.u-ga.fr/item/GDZPPN002417642/