1. A. Rodriguez-Vazquez and M. Delgado-Restituto, “CMOS design of chaotic oscillators using state variables: A monolithic Chua’s circuit,” IEEE Trans. Circuits Syst.Ⅱ, vol.40, no .10, 596-613 (1993).
2. M. Delgado - Restituto and A. Rodriguez-Vazquez, “Design considerations for integrated continuous-time chaotic oscillators,” IEEE Trans. Circuits Syst. Ⅰ, vol.45, no.4, 481-495 (1998).
3. M. Delgado - Restituto, M. Li nan, and A. Rodriguez – Vazquez, “CMOS 2.4μm chaotic oscillator: Experimental verification of chaotic encryption of audio,” Elec. Lett., vol.32,795-796 (1996).
4. Liu, C., “Analysis of Chua's dual chaotic circuit,” Acta Phys. Sin. Papers 51 ,1198 (2002).
5. Li, Y., Yu, S., Dai, Q., Liu, M., and Liu, Q., “A New Design method and hardware implementation of Chua's Circuit,” Acta Phys. Sin. Papers 55,3938 (2006).