%0 Journal Article
%A Schmüdgen, Konrad
%T Around Hilbert's 17th problem
%J Documenta mathematica
%D 2012
%P 433-438
%V Optimization Stories
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DOCMA_2012__S3__a3/
%G en
%F DOCMA_2012__S3__a3