@article {3239, title = {Nonlinear digital signal processing in mental health: characterization of major depression using instantaneous entropy measures of heartbeat dynamics}, journal = {Frontiers in physiology}, volume = {6}, year = {2015}, keywords = {Bioengineering}, author = {G. Valenza and R. G. Garcia and L. Citi and E. P. Scilingo and C. A. Tomaz and R. Barbieri} }