[1] IbenKraglundHolfort, Jrgen Arendt Jensen, ”Broadband Minimum Variance Beam- forming for Ultrasound Imaging” , IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 56, no. 2, February 2009.

[2] Johan-Fredrik Synnevg, Sverre Holm, ”A LowComplexity Data-Dependent Beam- former”,IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 57, no. 2, February 2010.

[3] BabakMohammadzadehAsl and Ali Mahloojifar,” A Low-Complexity Adaptive Beamformer for Ultrasound Imaging Using Structured Covariance Matrix” ,IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 59, no. 4, April 2012.

[4] BabakMohammadzadehAsl, Ali Mahloojifar,”Minimum Variance Beamforming Combined with Adaptive Coherence Weighting Applied to Medical Ultrasound Imag- ing”,IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 56, no. 9, September 2009.

[5] MinfenShen,QiongZhang,DelaiLi,Jinyao Yang,”Beamspace Sparse Representation Weighting Beamforming for Plane Wave Emission Ultrasound Instrument”,2011 IEEE.