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Xu, Jie. (2017). [IEEE 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting - San Diego, CA, USA (2017.7.9-2017.7.14)] 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting - Degrees of freedom of OAM-based communication systems. , (), 1157–1158. doi:10.1109/APUSNCURSINRSM.2017.8072621 
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