9Cooper, S. Y. , 1999. Sectoral differences in the location and operation of high technology small firms: some issues for economic development. In: Oakey, R. P., During, W., Mukhtar, S. -- M. (Eds.), New Technology-- based Firms in the 1990s. Pergamon, London, pp. 170-184.
10Chesbrough, H. , 2003. Open-- Innovation. Harvard Business School Press, Boston, MA.