1. Bundle-branch Block With Short P-R Interval in Healthy Young People Prone to Paroxysmal Tachycardia;Wolff;Am. Heart J.,1930
2. Die Electrokardiographie, als Untersuchungs methode des Herzens und ihre Ergebnisse;Hoffmann,1914
3. Clinical Electrocardiography;Lewis,1928
4. The Electrocardiogram in Thyroid Disease;White;Arch. Int. Med.,1918
5. Heart in Exophthalmic Goiter and Adenoma With Hyperthyroidism;Willius;M. Clin. North America,1923