References:

• S. Anderson, and A. Nehorai, "Analysis of a polarized seismic wave model," IEEE Trans. on Signal Processing, Vol. SP-44, pp. 379-386, Feb. 1996.
• D. Donno, A. Nehorai and U. Spagnolini, "Seismic velocity/polarization estimation and polarized wavefield separation," IEEE Int. Conf. Acoust., Speech, Signal Processing (ICASSP), Vol. IV, pp. 1181-1184, Toulouse, France, May 2006.
• D. Donno, A. Nehorai, and U. Spagnolini, "Seismic velocity and polarization estimation for wavefields separation," IEEE Trans. on Signal Processing. Vol. 56, pp. 4794-4809, Oct. 2008.