1. Calibrated phonocardiography and electrocardiography, a clinical study of normal children and children with congenital heart disease;Mannheimer;Acta paediatrica,1940
2. Kalibrierte Phonokardiographie;Mannheimer;Cardiologia,1942
3. Some aspects on the method of calibrated phonocardiography;Mannheimer;Cardiologia,1946
4. Gallop rhythm in children studied by means of calibrated phonocardiography, an experimental and clinical investigation;Carlgren;Acta paediatrica,1947