Effect of an auxiliary mode on bipartite entanglement in a dissipative three-mode optomechanical systemLihui Sun, Feng Xia, Kaikai Zhang, Huafeng Zhang and Dahai XuEur. Phys. J. D, 71 12 (2017) 311DOI: https://doi.org/10.1140/epjd/e2017-80550-6