@article{articlee03dfd39, title = {Testing the entanglement of intense beams produced by a non-degenerate optical parametric oscillator}, author = {Villar, A S and Martinelli, Marcelo and Nussenzveig, Paulo Alberto}, year = {2004}, doi = {10.1016/j.optcom.2004.09.006}, journal = {Optics Communications,} }