%0 Journal Article %A Xie, Heng %T An application of Hermitian K-theory: sums-of-squares formulas %J Documenta mathematica %D 2014 %P 195-208 %V 19 %I mathdoc %U http://geodesic.mathdoc.fr/item/DOCMA_2014__19__a39/ %G en %F DOCMA_2014__19__a39