Ringo, J A Frequency modulation of heart rate of increase low-frequency content of cardiovascular signals. [electronic resource] - IEEE transactions on bio-medical engineering Jul 1982 - 537-41 p. digital Publication Type: Journal Article ISSN: 0018-9294 Standard No.: 10.1109/TBME.1982.324926 doi Subjects--Topical Terms: AnimalsBlood Flow VelocityBlood PressureDogsHeart Rate