The Cooperation Innovation Across City Boundary and Radiation Distance——Based on the Cross-city Cooperation-patent Application Data
Xin NIU, Xiang-dong CHEN
SCIENTIA GEOGRAPHICA SINICA ›› 2013, Vol. 33 ›› Issue (6) : 659-667.
The Cooperation Innovation Across City Boundary and Radiation Distance——Based on the Cross-city Cooperation-patent Application Data
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