Koson Pitaksuttayaprot and  Winai Jaikla,  Implementation of Second Order Current- Mode Quadrature Sinusoidal Oscillator with Current Controllability.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2013, vol. 75(3). 304 - 306
    [viewed 11 May 2024]. Available from: https://publications.waset.org/pdf/4074.