1. Australian National Health & Medical Research Council (1985): ‘Code of practice for the safe use of shortwave (radiofrequency) diathermy units’ (Australian Government Publishing Service, Canberra, Australia, 1985)
2. Australian Physiotherapy Association (1992): ‘Clinical standards for the use of electrotherapy agents’ (Australian Physiotherapy Association, Victoria, 1992)
3. British Standard BS 5724-1 (1979): ‘Medical electrical equipment. Specification for general safety requirement’ (British Standards Institution, London, UK, 1979)
4. British Standard BS 5724-2-3 (1983): ‘Section 2.3 Specification for shortwave therapy equipment’ (British Standards Institution, London, UK, 1983)
5. Chartered Society of Physiotherapy (1992): ‘Guidelines for the safe use of continuous shortwave therapy equipment’,Physiother.,78, pp. 755–757