Bibliometric and Visualized Analysis of China's Smart Grid Research 2008-2018.

Front Res Metr Anal · 2020 · PMC8028385 · PMID 33870044

Europe PMC DOI

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an increasing trendno p-value reported

In 2013, the number of inter-agency collaborations began to increase significantly, and the number of inter-agency collaboration papers in the following years showed an increasing trend.

also in 63,971 other papers

showed a trendno p-value reported

The number of international cooperation and non-international cooperation papers all showed a trend of growth and a larger percentage of international cooperation in 2009.

also in 53,322 other papers

Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.