Chinese Physics B
Advantage of populous countries in the trends of innovation efficiency
Dan-Dan Hu(胡淡淡), Xue-Jin Fang(方学进), and Xiao-Pu Han(韩筱璞)
Chin. Phys. B . 2022, (6): 68903 -068903 .  DOI: 10.1088/1674-1056/ac5614

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