@article{1250128489, author = {Farkas, Daniel R.}, title = {Crystallographic groups and their mathematics}, journal = {Rocky Mountain J. Math.}, volume = {11}, number = {4}, year = {1981}, pages = { 511-552}, language = {en}, url = {http://dml.mathdoc.fr/item/1250128489} }
Farkas, Daniel R. Crystallographic groups and their mathematics. Rocky Mountain J. Math., Tome 11 (1981) no. 4, pp. 511-552. http://gdmltest.u-ga.fr/item/1250128489/