1. Bennett, P.A.: ‘The safety of industrially based controllers incorporating software’, 1984, PhD Thesis,
2. Ministry of Defence‘Draft Interim Defence Standard’, 00–55, 1989
3. A study of computer-based systems safety practices of UK, European and USA industry, (IEE 1989 December)
4. Programmable electronic systems in safety applications, (HMSO 1987),The Health & Safety Executive
5. ‘Software for computers in the application of industrial safety-related systems (proposal for a Standard)’, IEC SC65A (Secretariat) 94, June, 1989