1. The Botallo mystery;Fransson;Clin Cardiol,1999
2. Leonardo da Vinci on the human body: the anatomical, physiological and embryological drawings (with his notes) of Leonardo da Vinci;Da Vinci,1952
3. The history of cardiology;Acierno,1994
4. Die Roentgendiagnostik der inneren Erkrankungen;Assmann,1921
5. Interatrial septal defect;Roesler;Arch Intern Med,1934