[4] Agarwal G S. Nonclassical statistics of fields in pair coherent states.J Opt Soc Am (B),1988,5(9):1940~1947
[5] Lu Hong,Guo Guangcan. Nonclassical properties of photon-added pair coherent states.Acta Physica Sinica (Overseas Edition),1999,8(8):577~582
[6] Shen Huajia, Huang Chunqing , Jiang Junqin. Nonclassical properties of superposition of the excited pair coherent state.Acta Photonica Sinica, 2002,31(10):1174~1177