1. Las Arritmias eb Clinica, Buenos Aires;Battro, A.,1937
2. Heart Disease;Bramwell, C.,1932
3. Cohn, A. E., and Lewis, T. (1913). Heart, 4, 15.
4. Drury, A. N., and Iliescu, C. C. (1921). Heart, 8, 171.
5. Synopsis of Diseases of the Heart and Arteries;Herrmann, G.R.,1936