%0 Journal Article %A Ismail Idris %T Orderings and preorderings in rings with involution %J Colloquium Mathematicum %D 2000 %P 15-20 %V 83 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-83-1-15-20/ %R 10.4064/cm-83-1-15-20 %G en %F 10_4064_cm_83_1_15_20