Kritphon Phanruttanachai and  Winai Jaikla,  Third Order Current-mode Quadrature Sinusoidal Oscillator with High Output Impedances.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2013, vol. 75(3). 300 - 303
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/723.