1. A review of information systems evaluation: content, context and process;Symons;European Journal of Information Systems,1991
2. Shaping The Future: Business Design Through Information Technology;Keen,1991
3. Controlling IT Investment, Strategy and Management;Hochstrasser,1991
4. Information Management. The Evaluation of Information Systems Investments;Willcocks,1994
5. Op. cit., Ref. 4.