1. Course and prognosis of chronic obstructive lung disease;Burrows;N Engl J Med,1969
2. Simple electrocardiographic features of importance for prognosis in severe chronic broncial obstruction;Kok-Jensen;Scand J Resp Dis,1975
3. The electrocardiographic diagnosis of pulmonary arterial hypertension in chronic pulmonary disease;Bernard,1977
4. Does multivariate statistical analysis of electrocardiographic signals improve the diagnosis of cor pulmonale (C.P.C.)?;Block,1977
5. Electrocardiographic estimation of pulmonary impairment in chronic obstructive lung disease;Carilli;Chest,1973