@article{1195518372, author = {Ito, Tei-ichi and Sadanaga, Ryoichi}, title = {On the crystallographic space groupoid}, journal = {Proc. Japan Acad.}, volume = {52}, number = {10}, year = {1976}, pages = { 119-121}, language = {en}, url = {http://dml.mathdoc.fr/item/1195518372} }
Ito, Tei-ichi; Sadanaga, Ryoichi. On the crystallographic space groupoid. Proc. Japan Acad., Tome 52 (1976) no. 10, pp. 119-121. http://gdmltest.u-ga.fr/item/1195518372/