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| Country | No of papers |
|---|---|
| Australia | 3 |
| Brazil | 3 |
| Canada | 1 |
| Chile | 1 |
| China | 3 |
| Czech Republic | 1 |
| Denmark | 1 |
| Ecuador | 1 |
| Finland | 1 |
| France | 1 |
| Germany | 1 |
| Iceland | 1 |
| India | 2 |
| Iran | 4 |
| Italy | 1 |
| Japan | 2 |
| Malaysia | 1 |
| Netherland | 2 |
| Nigeria | 1 |
| Poland | 1 |
| Russia | 1 |
| Serbia | 1 |
| Slovakia | 1 |
| South Africa | 3 |
| South Korea | 3 |
| Spain | 1 |
| Tanzania | 1 |
| Thailand | 1 |
| Turkey | 1 |
| UK | 1 |
| US | 3 |
| Vietnam | 1 |
