TY - JOUR T1 - Dominant Lyapunov exponent and approximate entropy in heart rate variability during emotional visual elicitation JF - Frontiers in Neuroengineering Y1 - 2012 A1 - G. Valenza A1 - Allegrini, P. A1 - A Lanata A1 - E. P. Scilingo KW - Bioengineering VL - 5 ER -