Power spectral analysis of a beat-to-beat heart rate and blood pressure variability as a possible marker of sympatho-vagal interaction in man and conscious dog - Pagani, M; Lombardi, F; Guzzetti, S; Rimoldi, O; Furlan, R; Pizzinelli, P; Sandrone, G; Malfatto, G; DeirOrto, S; Piccaluga, E; Turiel, M; Baselli, G; Cerutti, S; Malliani, A (Circ Res, 1986)