%0 Journal Article %A Przemyslaw Koprowski %T Local-global principle for Witt equivalence of function fields over global fields %J Colloquium Mathematicum %D 2002 %P 293-302 %V 91 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm91-2-8/ %R 10.4064/cm91-2-8 %G en %F 10_4064_cm91_2_8