Increasing the Dynamic Range of a Pulse Oximeter using Heart Rate Characteristics. - Chris J. Brouse; Ronald D. Gatzke; Daniel K. Freeman; Yu Chen (CinC, 2014)

Saturation of the Right-Leg Drive Amplifier in Low-Voltage ECG Monitors. - Daniel K. Freeman; Ronald D. Gatzke; Georgios Mallas; Yu Chen; Chris J. Brouse (IEEE Trans. Biomed. Eng., 2015)