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@article{MAN_1980__253_163476, author = {Jon Kr. Arason}, title = {Der {Wittring} projektiver {R\"aume.}}, journal = {Mathematische Annalen}, pages = {205--212}, publisher = {mathdoc}, volume = {253}, year = {1980}, zbl = {0431.10011}, url = {http://geodesic.mathdoc.fr/item/MAN_1980__253_163476/} }
Jon Kr. Arason. Der Wittring projektiver Räume.. Mathematische Annalen, Tome 253 (1980), pp. 205-212. http://geodesic.mathdoc.fr/item/MAN_1980__253_163476/