1. Weissler, A. M., R. Lewis, R. Leighton: The systolic time intervals as a measure of left ventricular performance in man. In: R. N. Yu and J. F. Goodwin, editors: Progress in cardiology, Lea & Febiger, p. 155 (Philadelphia 1972).
2. Harris, W. S.: Systolic time intervals in the noninvasive assessment of left ventricular performance in man. In: I. Mirshy, D. M. Ghisten, and H. Sandler, editors. Cardiac mechanics, physiological, clinical and mathematical considerations. J. Wiley & Sons Inc., p. 233 (New York, London, Sydney, Toronto 1974).
3. Lewis, R. P., S. E. Rittgers, W. E. Forester, H. Bondoulas: A critical review of the systolic time intervals. Circulation56, 146 (1977).
4. Kesteloot, H.: On the clinical value of mechanocardiography. Eur. J. Cardiol.4, 393 (1976).
5. List, W. F., J. S. Gravenstein, D. H. Spodick: Systolic time intervals. In: International Symposium, Graz, Austria, Sept. 1–2, 1978. Springer (Berlin, Heidelberg, New York 1980).