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APA Citation
Li, J., Huang, Y., Wen, G., Xue, X., & Song, J. (2015). compact and high‐selectivity microstrip bandpass filter using two‐stage twist‐modified asymmetric split‐ring resonators. Electronics letters, 51(8), 635–637. http://access.bl.uk/ark:/81055/vdc_100124828698.0x000057