1. Implantable demand pacemaker;Jude, J.R.; Mobin-Udden, K.; Berkovits, B.V.;British Heart Journal,1968
2. 1969. Syncope during standby cardiac pacing;Friedberg, H.D.;British Heart Journal
3. 1969. Long-term control of intractable supraventricular tachycardia by ventricular pacing;Balcon, R.; Preston, T.; Leaver, D.; Yacoub, M.;British Heart Journal
4. Arrhythmias induced by pacemaking on demand;Spritzer, R.C.; Donoso, E.; Gadboys, H.L.; Friedberg, C.K.;American Heart J'ournal,1969