1. Failure of the right ventricle;Armstrong, T.G.;British Heart Journal,1940
2. The ECG diagnosis of pulmonary heart disease;Burch, G.E.; DePasquale, N.P.;American Journal of Cardiology,1963
3. SystoliC and diastolic loading of the heart. II. Electrocardiographic data;Cabrera, C. E.; Monroy, J. R. 1952;American Heart Journal
4. 1962. The electrocardiogram in chronic bronchitis with generalized obstructive lung disease and its relation to ventilatory function;Caird, F.I.; Wilcken, D.E.L.;American Journal of Cardiology
5. P wave changes in chronic obstructive pulmonary disease;Calatayud, J.B.; Abod, J.M.; Khoi, N.B.; Stanbro, W.W.; Silver, H.M.;American HeartJournal,1970