1. On the variability of the size of the pulse in cases of atrial fibrillation;Einthoven;Heart,1915
2. The Mechanism and Graphic Registration of the Heart Beat;Lewis,1925
3. Clinical determination of left venticular contractility by hemodynamics and myocardial mechanics;Mason,1972
4. Cardiovascular Pathophysiology;van der Werf,1980
5. Reproducibility of linear cardiac output measurement by Doppler ultrasound alone;McLennan;Br Heart J,1986