1. Etiology of atrio-ventricular heart block: a study of its relevance to prognosis and pacemaker therapy;1963, S.;Cardiovascular Research Center Bulletin
2. Adams-Stokes syndrome. A review and follow-up study of forty-two cases;Johansson, B.W.;American Journal of Cardiology,1961
3. Natural history of pacemaker patients;Sowton, E.; Flores, J.;Bulletin of the New York Academy of Medicine,1971
4. The deaths not related to pacing have been due to various natural causes, and it is reasonable to assume that pacing has not affected this death rate in either;Zion, M.M.; Obel, I.W.P.; Marchand, P.; Fuller, D.N.;South African Medical Journal; Electrical pacing of the heart in atrioventricular block,1964