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Leydesdorff, L., Wagner, C. S., Porto-Gomez, I., Comins, J. A., & Phillips, F. (2019). Synergy in the knowledge base of U.S. innovation systems at national, state, and regional levels: ..., JASIST 70(10), 1108-1123. http://doi.org/10.1002/asi.24182 

Best,
Loet


Loet Leydesdorff

Professor emeritus, University of Amsterdam
Amsterdam School of Communication Research (ASCoR)

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Associate Faculty, SPRU, University of Sussex;

Guest Professor Zhejiang Univ., Hangzhou; Visiting Professor, ISTIC, Beijing;

Visiting Fellow, Birkbeck, University of London;

http://scholar.google.com/citations?user=ych9gNYAAAAJ&hl=en