DHSS, 1981, Health Equipment Information
HMSO, 1982, Manufacturers' Aid to Checking Medical Electrical Equipment. Standard Test Format—Guide to the Use of British Standard 5724 Part 1
International Electrotechnical Commission 601-1 (1977) Safety of Medical Electrical Equipment, Part 1: General Requirements, 1st edn 1977. Title later changed to Medical Electrical Equipment, Part 1: General Requirements for Safety, 2nd edn with corrections and improvements, 1988.