Cheng , Yuanyuan and Zhai , Liangjun. (2016). Dynamics of Bipartite Vibrational Entanglement under the Inherent Decoherence Process in $H_2O$.
            <i>Journal of Atomic and Molecular Sciences</i>. <i>7</i> (4).
            213-224.
         doi:10.4208/jams.061616.081016a