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Evolution of scientific collaboration on COVID-19: A bibliometric analysis.
Learn Publ. 2021 Jul;34(3):429-441. doi: 10.1002/leap.1382. Epub 2021 Apr 8.
Learn Publ. 2021.
PMID: 34230773
Free PMC article.
Does Environmental Regulation Promote Environmental Innovation? An Empirical Study of Cities in China.
Duan D, Xia Q.
Duan D, et al.
Int J Environ Res Public Health. 2021 Dec 23;19(1):139. doi: 10.3390/ijerph19010139.
Int J Environ Res Public Health. 2021.
PMID: 35010397
Free PMC article.
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