Multipartite Greenberger-Horne-Zeilinger paradoxes for continuous   variables
  We show how to construct Greenberger-Horn-Zeilinger type paradoxes for continuous variable systems. We give two examples corresponding to 3 party and 5 party paradoxes. The paradoxes are revealed by carrying out position and momentum measurements. The structure of the quantum states which lead to these paradoxes is discussed. 
Serge Massar and Stefano Pironio