@article{article781e1a57,
title   = {Entanglement in the above-threshold optical parametric oscillator},
author = {Villar, Alessandro S and Cassemiro, Katiúscia N and Dechoum, Kaled and Khoury, Antonio Z and Martinelli, Marcelo and Nussenzveig, Paulo Alberto},
year = {2007},
doi = {10.1364/josab.24.000249},
journal   = {Journal of the Optical Society of America B - Optical Physics}
}