9Ham L, Xu Y. Design of generalized E L Gamal type digital signa- ture schemes based on discrete logarithm[J]. Electron Lett, 1994, 30(24) : 2025-2026.
10Xue F L, Qun F Z, Man Y S, et al. Vitellogenic responses of 17β- estradiol and bisphenol A inmale Chinese loach (Misgurnus anguilli- caudatus) [J]. Environ Toxicol Phannacol, 2007, 24: 155-159.