@article {2247,
	title = {Instantaneous monitoring of heart beat dynamics during anesthesia and sedation},
	journal = {Journal of Computational Surgery},
	volume = {3},
	year = {2014},
	author = {G. Valenza and O. Akeju and K. J. Pavone and L. Citi and K. E. Hartnack and A. Sampson and Purdon, P.L. and Brown, E.N. and R. Barbieri}
}
