1. Barnett, H. G. (1953). Innovation: The Basis of Cultural Change. New York: McGraw-Hill.
2. Brockhoff, K. (1999). Forschung und Entwicklung: Planung und Kontrolle (5th ext. & rev. ed.). Muenchen: Oldenbourg.
3. Damanpour, F. (1991). Organizational Innovation: A Meta-Analysis of Effects of Determinants and Moderators. Academy of Management Journal, 34(3), pp. 555–590.
4. Dewar, R. D. & Dutton, J. E. (1986). The Adoption of Radical and Incremental Innovations: An Empirical Analysis. Management Science, 32(11), pp. 1422–1433.
5. Goldhar, J. L.(1980). Some Conclusions. In: Dean, B. V., & Goldhar, J. L. (Eds.) Management of Research and Innovation. Amsterdam: North-Holland Publ. Co., pp. 283–284.