1. De Motu Animalium by G. A. Borelli. Lugduni Batavorum (1679).
2. Biomechanics of Human Motion by M. Williams and H. R. Lissner. W. B. Saunders, Philadelphia (1962).
3. Ballistocardiography by I. Starr and A. Noordergraaf. J. B. Lippincott, Philadelphia (1967).
4. “On Certain Molar Movements of the Body Produced by the Circulation of the Blood,” by J. W. Gordon. Journal of Anatomic Physiology 11, 533 (1877).
5. “On Certain Molar Movements of the Human Body Produced by Circulation of the Blood,” by C. Trotter, Journal of Anatomic Physiology 11, 755 (1877).