%0 Journal Article
%A Jean-Pierre Gazeau
%A Petr Siegl
%A Ahmed Youssef
%T Krein Spaces in de Sitter Quantum Theories
%J Symmetry, integrability and geometry: methods and applications
%D 2010
%V 6
%U http://geodesic.mathdoc.fr/item/SIGMA_2010_6_a10/
%G en
%F SIGMA_2010_6_a10