1. The definition of parasystole;Schamroth;Cardiologia (Basel),1964
2. Klinischer Beitrag sur Parasystolie;Müller;Cardiologia (Basel),1959
3. Parasystole;Scherf;Amer. J. Cardiol.,1963
4. Parasystole;Chung;Progr. Cardiovasc. Dis.,1968
5. Clinical vectorcardiography and electrocardiography;Massie,1960