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Top 10 country with the most publications.
| Country | Count | Centrality | Year | H-index | Total citations |
|---|---|---|---|---|---|
| USA | 347 | 0.26 | 1996 | 67 | 18628 |
| PEOPLES R CHINA | 165 | 0.10 | 2000 | 31 | 4339 |
| SPAIN | 162 | 0.20 | 1999 | 52 | 9308 |
| JAPAN | 156 | 0 | 2000 | 32 | 3614 |
| ITALY | 145 | 0.11 | 1996 | 48 | 7422 |
| ENGLAND | 140 | 0.29 | 1996 | 54 | 9262 |
| GERMANY | 134 | 0.04 | 1996 | 43 | 6273 |
| INDIA | 96 | 0.09 | 2000 | 33 | 3446 |
| CANADA | 65 | 0.04 | 1997 | 31 | 3503 |
| DENMARK | 56 | 0.17 | 2001 | 31 | 2946 |
