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@article{CMH_1980__55_139851, author = {Norbert Klingen}, title = {\"Uber schwache quadratische {Zerlegungss\"atze.}}, journal = {Commentarii mathematici Helvetici}, pages = {645--651}, publisher = {mathdoc}, volume = {55}, year = {1980}, zbl = {0459.12009}, url = {http://geodesic.mathdoc.fr/item/CMH_1980__55_139851/} }
Norbert Klingen. Über schwache quadratische Zerlegungssätze.. Commentarii mathematici Helvetici, Tome 55 (1980), pp. 645-651. http://geodesic.mathdoc.fr/item/CMH_1980__55_139851/