Task Force of the European Society of Cardiology and the North American Society of Pacing and Electrophysiology. Heart rate variability: standards of measurement, physiological interpretation, and clinical use. Retrieved from http://circ.ahajournals.org/content/93/5/1043#ref-6 (页面存档备份,存于互联网档案馆)
Task Force of the European Society of Cardiology and the North American Society of Pacing and Electrophysiology. Heart rate variability: standards of measurement, physiological interpretation, and clinical use. Retrieved from http://circ.ahajournals.org/content/93/5/1043#ref-6 (页面存档备份,存于互联网档案馆)