Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{JRAM_1970__241_151006, author = {Norman L. Alling}, title = {Real {Banach} algebras and nonorientable {Klein} surfaces. {I.}}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {200--208}, publisher = {mathdoc}, volume = {241}, year = {1970}, zbl = {0191.13703}, url = {http://geodesic.mathdoc.fr/item/JRAM_1970__241_151006/} }
Norman L. Alling. Real Banach algebras and nonorientable Klein surfaces. I.. Journal für die reine und angewandte Mathematik, Tome 241 (1970), pp. 200-208. http://geodesic.mathdoc.fr/item/JRAM_1970__241_151006/