1. El-Sherif N, Restivo M, Craelius W, et al. High resolution electrocardiography — Basic and clinical aspects. In: Hombach V, Hilger HH, Kennedy HL, editors. Electrocardiography and Cardiac Drug Therapy. Dordrecht: Kluwer Academic Publishers; 1985:172–203.
2. Josephson ME, Horowitz LN, Spielman SR, Greenspan AM, Van de Pol C, Harken AH. Comparison of endocardial catheter mapping with intraoperative mapping of ventricular tachycardia. Circulation. 1980;61:395–404.
3. Berbari EJ, Lazzara R, Samet P, Scherlag BJ. Noninvasive technique for detection of electrical activity during the P-R segment. Circulation. 1973;48:1005–13.
4. Stopczyk MJ, Kopec J, Zochowski RJ, Pieniak M. Surface recording of electrical heart activity during the P-R segment in man by a computer averaging technique (abstract). Int Res Commun Syst. 1973;11:21–2.
5. Flowers NC, Horan LG. His bundle and bundle branch recordings from the body surface (abstract). Circulation. 1973;48:IV–102.