1. Curd, G. W., Jr., Dennis, E. W., Jordan, J., McNamara, D., Montero, A. C., Peterson, P. K., Pruitt, R. D., Schnur, S.: Etiology of atrioventricular heart block: a study of its revelance to prognosis and pacemaker therapy. Cardiovasc. Res. Cent. Bull.1, 63 (1963).
2. Levin, P. D., Sessions, R. W., Passovoy, M.,Carleton, R. A.: Patient and pacemaker survival after pacemaker implantation. Chest58, 4 (1970).
3. Dittrich, H.: Derzeitiger Stand der Herzschrittmacherbehandlung. Fortschr. Med.88, 885 (1970).
4. Dixon, W. J.: BMD, biomedical computer programs. Health Sciences Computing Facility. Dep. of Preventive Medicine and Public Health. School of Medicine, University of California, Los Angeles (1964).
5. Friedberg, C. K., Donoso, E., Stein, W. G.: Nonsurgical acquired heart block. Ann. N. Y. Acad. Sci.111, 835 (1964).