1. Sino-atrial syncope;Easley, R.M.; Goldstein, S.;American Journal of Medicine, So,1971
2. The nature of so-called sino-auricular block;Resnik, W.H.;Archives of Internal Medicine,1925
3. Experimental sinoauricular block. Proceedings of the Society for;Scherf, D. 1946;Experimental Biology and Medicine
4. 1969. The mechanism of sinoatrial block;Scherf, D.;American Journal of Cardiology