1. G. Kratschmer "Introduction into theory of direction finding," in Radiomonitoring & Radiolocation 2010/2011, Munich, Rhode & Schwarz, 2010.
2. E. Rastorgueva-Foi, M. Costa, M. Koivisto, K. Leppanen, and M. Valkama, "Dynamic beam selection for beam-RSRP based direction finding in mmW 5G networks," in 2018 International Conference on Indoor Positioning and Indoor Navigation(IPIN), Nantes, 2018, pp. 1-6. 10.1109/IPIN.2018.8533735
3. N. B. Suryavanshi, K. V. Reddy, and V. R. Chandrika, "Direction finding capability in bluetooth 5.1 standard," in 2019 International Conference on Ubiquitous Communications and Network Computing, 2019, pp. 53-65. 10.1007/978-3-030-20615-4_4
4. J. W. Yu, "MIMO/3-D beamforming antenna", The Proceeding of the Korean Institute of Electromagnetic Engineering and Science, Nov. 2014, vol. 25, no. 6, pp. 3-11.
5. M. S. Lee, I. S. Na, J. H. Go, and J. O. Park, "Development trends of electromagnetic wave localization technology", The Proceeding of the Korean Institute of Electromagnetic Engineering and Science, Nov. 2016, vol. 27, no. 6, pp. 44-49.