1. A study of the oesophageal lead in clinical electrocardiography;Brown;Amer. Heart J.,1936
2. Über die direkte Ableitung der Aktionsströme des menschlichen Herzens vom Oesophagus und über das Elektrokardiogram des Fötus;Cremer;Münch. med. Wschr.,1906
3. Right atrial electrocardiography;Dreifus;J. Amer. med. Ass.,1966
4. Recording of intra-cavity potentials through a single lumen, saline-filled cardiac catheter;Hellerstein;Proc. Soc. exp. Biol. (N.Y.),1949
5. Right atrial electrocardiogram in the analysis of arrhythmias following acute myocardial infarction;Jewitt;Brit. Heart J.,1968