The geographical and institutional proximity of research collaboration
| Autor: | Ponds, Roderik 1, 2, Van Oort, Frank 1, 2, Frenken, Koen 2 |
|---|---|
| Zdroj: | In Papers in Regional Science August 2007 86(3):423-444 |
| Databáze: | ScienceDirect |
| Externí odkaz: |
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| Autor: | Ponds, Roderik 1, 2, Van Oort, Frank 1, 2, Frenken, Koen 2 |
|---|---|
| Zdroj: | In Papers in Regional Science August 2007 86(3):423-444 |
| Databáze: | ScienceDirect |
| Externí odkaz: |
|