Wearable, Cuff-less PPG-Based Blood Pressure Monitor with Novel Height Sensor. - Phillip A. Shaltis; Andrew T. Reisner; H. Harry Asada (EMBC, 2006)

Cuffless Blood Pressure Monitoring Using Hydrostatic Pressure Changes. - Phillip A. Shaltis; Andrew T. Reisner; H. Harry Asada (IEEE Trans. Biomed. Eng., 2008)