The geographical and institutional proximity of research collaboration.
| Autor: | Ponds, Roderik1,2 ponds@rpb.nl, Van Oort, Frank1,2 oort@rpb.nl, Frenken, Koen3 k.frenken@geo.uu.nl |
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| Zdroj: | Papers in Regional Science. 2007, Vol. 86 Issue 3, p423-443. 21p. 4 Charts, 2 Graphs, 8 Maps. |
| Databáze: | Academic Search Ultimate |
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