A. C. Doherty, P. A. Parrilo, and F. M. Spedalieri, “Distinguishing separable and entangled states,” Phys. Rev. Lett. 88, 187904, (2002). quant-ph/0112007
A. C. Doherty, P. A. Parrilo, and F. M. Spedalieri, “Distinguishing separable and entangled states,” Phys. Rev. Lett. 88, 187904, (2002). quant-ph/0112007