Table 4.
Centrality indexes of the countries of the collaboration network.
| Country | Degree | Normalized degree |
|---|---|---|
| UK | 17.000 | 0.138 |
| Italy | 11.000 | 0.089 |
| Austria | 9.000 | 0.073 |
| France | 9.000 | 0.073 |
| China | 7.000 | 0.057 |
| USA | 7.000 | 0.057 |
| Germany | 6.000 | 0.049 |
| Spain | 6.000 | 0.049 |
| Argentina | 5.000 | 0.041 |
| Brazil | 5.000 | 0.041 |
| Chile | 5.000 | 0.041 |
| Colombia | 5.000 | 0.041 |
| Finland | 5.000 | 0.041 |
| Russia | 5.000 | 0.041 |
| Indonesia | 4.000 | 0.033 |
| Iran | 3.000 | 0.024 |
| Malaysia | 3.000 | 0.024 |
| Netherlands | 3.000 | 0.024 |
| Pakistan | 3.000 | 0.024 |
| Switzerland | 3.000 | 0.024 |
| Georgia | 2.000 | 0.016 |
| India | 2.000 | 0.016 |
| Nepal | 2.000 | 0.016 |
| Saudi Arabia | 2.000 | 0.016 |
| Sweden | 2.000 | 0.016 |
| Australia | 1.000 | 0.008 |
| Canada | 1.000 | 0.008 |
| Serbia | 1.000 | 0.008 |
| Slovakia | 1.000 | 0.008 |
| Slovenia | 1.000 | 0.008 |
| Sri Lanka | 1.000 | 0.008 |
| United Arab Emirates | 1.000 | 0.008 |
| Czech Republic | 0.000 | 0.000 |
| Greece | 0.000 | 0.000 |
| Hungary | 0.000 | 0.000 |
| Japan | 0.000 | 0.000 |
| Jordan | 0.000 | 0.000 |
| Portugal | 0.000 | 0.000 |
| South Korea | 0.000 | 0.000 |
| Taiwan | 0.000 | 0.000 |
| Thailand | 0.000 | 0.000 |
| Vietnam | 0.000 | 0.000 |