| Sr. No. | Country | Authors |
|---|---|---|
| 1 | Malaysia | 70 |
| 2 | Nigeria | 37 |
| 3 | China | 31 |
| 4 | Indonesia | 26 |
| 5 | Pakistan | 26 |
| 6 | Taiwan | 18 |
| 7 | Iran | 16 |
| 8 | Ghana | 15 |
| 9 | USA | 15 |
| 10 | Turkey | 11 |
| 11 | Bangladesh | 10 |
| 12 | Kenya | 9 |
| 13 | 9 | |
| 14 | Sri Lanka | 7 |
| 15 | Japan | 7 |
| 16 | India | 6 |
| 17 | Poland | 6 |
| 18 | South Korea | 6 |
| 19 | France | 5 |
| 20 | Korea | 5 |
| 21 | Ethiopia | 4 |
| 22 | Zimbabwe | 4 |
| 23 | Thailand | 4 |
| 24 | Germany | 4 |
| 25 | Australia | 4 |
| 26 | Russia | 3 |
| 27 | Mexico | 3 |
| 28 | Sweden | 3 |
| 29 | U.K | 3 |
| 30 | Bosnia and Herzegovina | 3 |
| 31 | South Africa | 3 |
| 32 | Greece | 3 |
| 33 | Finland | 3 |
| 34 | Malaysia | 3 |
| 35 | Portugal | 2 |
| 36 | Spain | 2 |
| 37 | Egypt | 2 |
| 38 | England | 2 |
| 39 | Italy | 2 |
| 40 | Ecuador | 2 |
| 41 | Vietnam | 2 |
| 42 | Iceland | 2 |
| 43 | Bangladesh. | 2 |
| 44 | Jordan | 1 |
| 45 | Romania | 1 |
| 46 | New Zealand | 1 |
| 47 | Bahrain | 1 |
| 48 | Georgia | 1 |
| 49 | Bulgaria | 1 |
| 50 | Tunisia | 1 |
| 51 | Peru | 1 |
| 52 | Lebanon | 1 |
