%0 Journal Article %A Knebusch, Manfred %A Zhang, Digen %T Convexity, valuations and Prüfer extensions in real algebra %J Documenta mathematica %D 2005 %P 1-109 %V 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DOCMA_2005__10__a18/ %G en %F DOCMA_2005__10__a18