1. Heart rate variability standards of measurement, physiological interpretation and clinical use;Circulation,1996
2. Heart rate variability;Malik;Curr Opin Cardiol,1998
3. Linear and non-linear dynamics of cardiovascular variability: validation and clinical applications;Beckers,2002
4. Decrease of cardiac chaos in congestive heart failure;Poon;Nature,1997
5. Detection of nonlinear dynamics in short, noisy data;Barahona;Nature,1996