1. H. Asplund, D. Astely, P. Butovitsch, T. Chapman, Multi-antenna technologies, in Advanced Antenna Systems for 5G Network Deployments (Academic Press, 2020), pp. 175–271
2. C. Sun, N. Karmakar, Adaptive array antennas, in Encyclopedia of RF and Microwave Engineering (Wiley Inc., Hoboken, NJ, 2015)
3. C. Balanis, Modern Antenna Handbook (Wiley Inc., Hoboken, NJ, 2007)
4. C. Balanis, Antenna Theory and Design, 4th edn. (Wiley Inc., Hoboken, NJ, 2016)
5. G. Tsoulos, Arrays and smart antennas, in Modern Antenna Handbook (Wiley Inc., Hoboken, NJ, 2007)