1. 1996.Research Policy, 25(2)
2. Bozzo, U., Freitas, E. and Higgins, T., eds. Proceedings of the International Workshop on Science Park Evaluation. Bari. March26–271992, Luxembourg. Commission of the European Communities.
3. A literature-based innovation output indicator
4. Eureka Program. 1994. “Evaluation of Eureka Industrial and Economic Effects”. Luxembourg