Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{JRAM_1972__252_151191, author = {Satoshi Arima}, title = {Canonical systems of double spaces.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {205--208}, publisher = {mathdoc}, volume = {252}, year = {1972}, zbl = {0236.14004}, url = {http://geodesic.mathdoc.fr/item/JRAM_1972__252_151191/} }
Satoshi Arima. Canonical systems of double spaces.. Journal für die reine und angewandte Mathematik, Tome 252 (1972), pp. 205-208. http://geodesic.mathdoc.fr/item/JRAM_1972__252_151191/