1. Abernathy, W.J., Utterback, J.M., 1978. Patterns of Industrial Innovation. Technology Review, June–July, pp. 40–47.
2. Ahituv, N., Neumann, S., 1984. A Flexible Approach to Information System Development. MIS Quarterly, June, pp. 69–78.
3. R&D performance as a function of internal communication, project management and the nature of the work;Allen;IEEE Transactions on Engineering Management,1980
4. Anderson, T.W. 1974. An Introduction to Multivariate Statistical Analysis. Wiley, New York.
5. Andrews, K.R., 1971. The Concept of Corporate Strategy. Irwin, Homewood.