References:

• F. A. Lee and A. Nehorai, "Adaptive power spectrum estimation algorithm for heart rate variability analysis," IEEE Conf. on Computers in Cardiology, pp. 273-276, Italy, Sep. 1991.
• A. Jeremic and A. Nehorai, "Estimating current density in the heart using structured and unstructured covariance analysis," Proc. 25th Annu. Int. Conf. IEEE Eng. Med. Biol. Soc., pp. 2335-2338, Cancun, Mexico, Sep. 2003.
• A. Jeremic and A. Nehorai, "Electro-mechanical imaging of the heart using tagged MRI and ECG/MCG arrays," Proc. 26th Annu. Int. Conf. IEEE Eng. Med. Biol. Soc., pp. 1006-1009, San Francisco, CA, Sep. 2004.