1. Principles of Cardiac Arrhythmias;Chung,1971
2. Clinical Electrocardiography. Part I. “The Arrhythmias”;Katz,1958
3. The electrophysiologic basis of parasystole and its variants;Pick,1976
4. The Disorders of Cardiac Rhythm;Schamroth,1980
5. Parasystole with a rapid ventricular center;Scherf;Am Heart J,1961