1. Neuere Untersuchungen über Herzstosz und Brustwandpulsationen;Landes;Medizin,1942
2. The low frequency tracings on the precordium;Luisada;Am. Heart J.,1952
3. Differentiation between the influence of the right and the left ventricle in the phonocardiogram, with the aid of pulsation curves;Hartman,1956
4. Exposition on phonocardiography and mechanography;Hartman,1958
5. The apexcardiogram;Hartman,1960