References

Porter, M.E. (1979) ‘How competitive forces shape strategy’, Harvard Business Review , vol. 57, no. 2, pp. 137–45.

Porter, M.E. (1996) ‘What is strategy?, Harvard Business Review , vol. 74, no. 6, pp. 61–78.

Porter, M.E. (2008) ‘The five competitive forces that shape strategy’, Harvard Business Review , vol. 86, no. 1, pp. 78–93.

Sloan, A. (2004) IPO’s success doesn’t justify Google’s price [Online]. Available at www.washingtonpost.com/wp-dyn/articles/A27391-2004Aug23.html (Accessed 28 February 2005).