1. History of sphygmology and of heart block;Schechter;Dis Chest,1969
2. On the pulse;Galen,1960
3. Perspectives in physiological monitoring;Geddes;Med Instrument,1976
4. Accuracy of radial pulse assessment by length of counting interval;Hollerbach;Heart Lung,1990
5. Accuracy of heart rate assessment in atrial fibrillation;Sneed;Heart Lung,1992