Country | Documents | Citable documents | Citations | Self-Citations | Citations per Document | H index | ||
---|---|---|---|---|---|---|---|---|
1 | United States | 21288 | 20729 | 1509848 | 654758 | 70.92 | 1073 | |
2 | Japan | 5301 | 5235 | 289427 | 54881 | 54.60 | 517 |
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