WASET
    Kapil Dev Sharma and  Kirat Pal and  Costas Psychalinos ,  A Resistorless High Input Impedance First Order All-Pass Filter Using CCCIIs.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2013, vol. 74(2). 213 - 215
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/9996920.