1. Evaluation of normal and abnormal sensing functions of demand pacemakers;Barold, S.S.; Gaidula, J.J.;American Journal of Cardiology,(I97ia).
2. Failure of demand pacemaker from low-voltage bipolar ventricular electrograms;Barold, S.S.; Gaidula, J.J.;Journal of the American Medical Association,(I97ib).
3. Irregular recycling of demand pacemakers from borderline electrographic signals;Barold, S.S.; Gaidula, J.J.; Lyon, J.L.; Carroll, M.;American Heart journal,1971
4. Technical problems with pacemakers;Castellanos, A.;New England Journal Of Medicine,(I97i).