WASET
    Hung-Wei Wu and  Yung-Wei Chen and  Yu-Fu Chen and  Cheng-Yuan Hung,  New Triangle-Ring UWB Bandpass Filter with Sharp Roll-Off and Dual Notched Bands.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2012, vol. 65(5). 497 - 500
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/6328.