1. The Form and Nature of the Muscular Connections Between the Primary Divisions of the Vertebrate Heart;Keith;J. Anat. & Physiol.,1907
2. Das Reizleitungssystem des Säugetierherzens;Tawara;Jena,1906
3. The Pacemaker of the Mammalian Heart;Lewis,1913
4. An Investigation of the Sino-auricular Node of the Mammalian Heart;Flack;J. Physiol.,1910
5. Über die Bedeutung des Keith-Flack'schen Knotens für den Herzrhythmus;Jaeger;Zentralbl. f. inn. Med.,1910