@article{PPN235181684_0270+dmdlog13, title = {Iterated Ring Class Fields and the 168-Tesselation.}, journal = {Mathematische Annalen}, volume = {270}, year = {1985}, pages = {69-78}, zbl = {0559.12007}, url = {http://dml.mathdoc.fr/item/PPN235181684_0270+dmdlog13} }
Cohn, Harvey. Iterated Ring Class Fields and the 168-Tesselation.. Mathematische Annalen, Tome 270 (1985) pp. 69-78. http://gdmltest.u-ga.fr/item/PPN235181684_0270+dmdlog13/