1. Fast beamforming algorithm;Williams;J Acoust Soc Am,1968
2. Howells PW, Intermediate frequency side-lobe canceller (1965).
3. Sarradj E, Schulze C, Zeibig A, Identification of noise source mechanisms using orthogonal beamforming, in: Noise and Vibration: Emerging Methods, 2005.
4. Functional beamforming;Dougherty,2014
5. L1 generalized inverse beam-forming algorithm resolving coherent/incoherent, distributed and multipole sources;Suzuki;J Sound Vib,2011