Beyond the Fokker-Planck equation: Stochastic simulation of complete Wigner representation for the optical parametric oscillatorL. I. Plimak, M. K. Olsen, M. Fleischhauer and M. J. CollettEurophys. Lett., 56 3 (2001) 372-378DOI: https://doi.org/10.1209/epl/i2001-00529-8