1. Amendment of recommendations for standardization of specifications for instruments in electrocardiography and vectorcardiography, concerning safety and electrical shock hazards;Committee on Electrocardiography, American Heart Association;Circulation,1972
2. Recommendations for standardization of leads and of specifications for instruments in electrocardiography and vectorcardiography;Committee on Electrocardiography, American Heart Association;Circulation,1975
3. Association for the Advancement of Medical Instrumentation: Safety Standards for Electromedical Apparatus: Safe Current Limits. Arlington Va AAMI 1974
4. Safe Current Limits for Electromedical Apparatus. American National Standard. ANSI-AAMI SCI 12/78 (publication no.)