WASET
    Mehmet Sagbas and  Kemal Fidanboylu and  Mehmet C. Bayram,  A New Current-mode Multifunction Filter with High Impedance Outputs Using Minimum Number of Passive Elements .   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2007, vol. 2(2). 333 - 336
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/7800.