Barbieri, Riccardo, Luca Citi, and Gaetano Valenza. "System and Method for Sympathetic and Parasympathetic Activity Monitoring by Heartbeat." U.S. Patent Application No. 15/749,838.

[1] G Valenza, L Citi, JP Saul, R Barbieri, "Measures of Sympathetic and Parasympathetic Autonomic Outflow from Heartbeat Dynamics", Journal of Applied Physiology, vol. 125, num 1, pp. 19-39, 2018.
[2] G Valenza, L Citi, R Barbieri, Disentanglement of Sympathetic and Parasympathetic Activity by Instantaneous Analysis of Human Heartbeat Dynamics, Engineering in Medicine and Biology Society (EMBC), 38th Annual International Conference of the IEEE, Orlando (FL), USA, 2016
[3] G Valenza, L Citi, VB Wyller, R Barbieri, "ECG-Derived Sympathetic and Parasympathetic Activity in the Healthy: An Early Lower-Body Negative Pressure Study Using Adaptive Kalman Prediction", Engineering in Medicine and Biology Society (EMBC), 39th Annual International Conference of the IEEE, Honolulu (Hawaii), USA, 2018.
[4] G Valenza, L Citi, JP Saul, R Barbieri, "ECG-Derived Sympathetic and Parasympathetic Nervous System Dynamics: A Congestive Heart Failure Study"Computing in Cardiology, 2018
[5] G Valenza, A Duggento, L Passamonti, N Toschi, R Barbieri, Resting State Neural Correlates of Cardiac Sympathetic Dynamics in Healthy Subjects, 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2019.
[6] M. Nardelli, L. Citi, R. Barbieri and G. Valenza, "Irregularity Analysis of Sympathetic and Parasympathetic Activity Indices from HRV: A Pilot Study on Postural Changes," 11th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO), Pisa, Italy, 2020, pp. 1-2.
[7] M. Nardelli, L. Citi, R. Barbieri and G. Valenza, "Intrinsic Complexity of Sympathetic and Parasympathetic Dynamics from HRV series: a Preliminary Study on Postural Changes," 42nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), Montreal, QC, Canada, 2020, pp. 2577-2580.
[8] G Valenza, F Faita, L Citi, J.P. Saul, RM Bruno, R Barbieri, Validation of Sympathetic Activity Index from Heart Rate Variability series: A Preliminary Muscle Sympathetic Nerve Activity Study, Proceedings of the Computing in Cardiology conference, Rimini (Italy), 2020