TY - JOUR T1 - Estimation of Instantaneous Complex Dynamics through Lyapunov Exponents: A Study on Heartbeat Dynamics JF - PLoS One Y1 - 2014 A1 - G. Valenza A1 - L. Citi A1 - R. Barbieri KW - Bioengineering VL - 9 IS - 8 ER -