1. Measuring technological change through patents and innovation surveys;Archibugi;Technovation,1996
2. Innovation surveys and patents as technology indicators: the state of the art;Archibugi,1996
3. EUROSTAT, 1994. The Community Innovation Survey. Status and perspectives. EuroStat, Luxemborg.
4. EUROSTAT, 1996. The regional dimension of R&D and innovation statistics. EU Commission, Luxembourg.
5. Embodied and disembodied innovative activities: evidence from the Italian innovation survey;Evangelista,1996