@article{chiou_kuo_cheng_2006, 
  title={Broadband quasi-Chebyshev bandpass filters with multimode stepped-impedance resonators (SIRs)}, 
  volume={54}, 
  DOI={10.1109/tmtt.2006.879131}, 
  publisher={Institute of Electrical and Electronics Engineers (IEEE)}, 
  author={Chiou and Kuo and Cheng}, 
  year={2006}
  }