1. Electrocardiography: practical applications with vectorial principles;Chung,1980
2. Electrocardiographic artifact due to malfunction of an electric watch;Lesch;JAMA,1974
3. EKG artifacts during intraoperative evoked potential monitoring;Legatt;Anesthesiology,1989
4. Transcutaneous nerve stimulation and the electrocardiograph;Kimberley;Anaesth Intens Care,1987
5. Electrocardiographic recognition of pacemakers;Yang,1983