1. Using photoplethysmography as part of nursing assessment;King;J Wound Care,1998
2. Photoplethysmography and its application in clinical physiological measurement;Allen;Physiol Meas,2007
3. The use of photoplethysmography in the assessment of venous insufficiency: a comparison to venous pressure measurements;Abramowitz;Surgery,1979
4. Photoplethysmography in the assessment of venous insufficiency;Nicolaides;J Vasc Surg,1987
5. Quantitative photoplethysmography in chronic venous insufficiency: a new method of noninvasive estimation of ambulatory venous pressure;Norris;Surgery,1983