Chen, Y. , Dai, Z. , Chiu, C. , Chiou, S. , Chen, Y. , Lin, Y. , Chen, K. , Wu, H. , Lee, H. , Su, Y. , Chang, S.. "Compact Dual-Band Bandpass Filter Based on Quarter Wavelength Stepped Impedance Resonators". World Academy of Science, Engineering and Technology, Open Science Index 112, International Journal of Electrical and Computer Engineering (2016), 10(4), 517 - 520.