W. Xu, W. J. Chappell, R. G. Crooks, and Z. Ouyang, "Characterization of Electrode Surface Roughness and its Impact on Ion Trap Mass Analysis," J. of Mass Spectrometry, vol. 44, no. 3, pp. 353-360, Nov. 2008.
 W. Xu, J. Mass, and W. Chappell, "Multi-Physics Simulation for Radio Frequency Ion Trap Chemical Sensing, " Proc. of Union Radio Scientifique Internationale (URSI), Chicago, IL, no. BK.8, Aug. 2008.
Wei Xu, Le-Wei Li, Hai-Ying Yao, Tat-Soon Yeo, and Qun Wu, " Extraction of Constitutive Relation Tensor Parameters of SRR Structures Using Transmission Line Theory ," Journal of Electromagnetic Waves and Applications , vol. 20, no. 1, pp. 13-25, January 2006.
Wei Xu, Le-Wei Li, Hai-Ying Yao, Tat-Soon Yeo, and Qun Wu, " Left-Handed Material Effects on Waves Modes and Resonant Frequencies: Filled Waveguide Structures and Substrate-Loaded Patch Antennas ," Journal of Electromagnetic Waves and Applications , vol. 19, no. 15, pp. 2033-2047, October, 2005.
Hai-Ying Yao, Wei Xu, Le-Wei Li, Qun Wu, and Tat-Soon Yeo , " Propagation Property Analysis of Metamaterial Constructed by Conductive SRRs and Wires Using the MGS-based Algorithm ," IEEE Transactions on Microwave Theory and Techniques (Special Issue on Metamaterials ), vol. 53, no. 4, pp. 1469-1476, April 2005.