%0 Journal Article %J IEEE Transactions on Signal Processing %D 2013 %T Point-Process Nonlinear Models with Laguerre and Volterra Expansions: Instantaneous Assessment of Heartbeat Dynamics %A G. Valenza %A L. Citi %A E. P. Scilingo %A R. Barbieri %K Bioengineering %B IEEE Transactions on Signal Processing %V 61 %P 2914–2926 %G eng %N 11