1. Ober thorakale Ableitung des Elektrokardiogramms;Ackermann, R.;Dtsch. Arch. klin. med,1924
2. Standardization of precordial leads;Barnes, A.R.; Pardee, H.E.B.; White, P.D.; Wilson, F.N.; Wolferth, C.C.;Amer. Heart J,1938
3. The effect of deep inbreathing on lead III of the electrocardiogram;Evans, W.;Brit. Heart J; Chest lead CR7 in cardiac infarction,1951
4. The chest lead electrocardiogram in health;Leatham, A.;Brit. Heart J,1950
5. Auricular fibrillation and its relationship to clinical irregularity of the heart;Lewis, T.;Heart,1910