I. Grant, India deal clears Skandia's app maintenance backlog, Computer Weekly, p.4, 2007.

B. Langefors, Theoretical Analysis of Information Systems, Studentlitterature Langefors, Essays on Infology, 1966.

G. Midgeley, Systems Thinking The story of socio-technical design, Sage Mumford Information Systems Journal, vol.16, issue.4, p.317, 2003.

A. Orlowski, Why Nokia failed: Wasted 2000 man years' on UIs that didn't work.' The Register, 2011.

P. A. Samuelson, W. D. Nordhaus, P. P. Mcgraw-hill-schoderbek, C. G. Schoderbek, A. G. Kefalas et al., Make sure you get a positive return, Management Systems: conceptual Considerations, 1990.