| Sr. No. | Country | Authors |
|---|---|---|
| 1 | Nigeria | 41 |
| 2 | Indonesia | 17 |
| 3 | China | 17 |
| 4 | USA | 16 |
| 5 | Bangladesh | 12 |
| 6 | Malaysia | 11 |
| 7 | Pakistan | 8 |
| 8 | Bangladesh | 8 |
| 9 | Tunisia | 7 |
| 10 | Turkey | 6 |
| 11 | Taiwan | 5 |
| 12 | Pakistan | 4 |
| 13 | Zimbabwe | 4 |
| 14 | India | 4 |
| 15 | Indonesia | 3 |
| 16 | Syria | 3 |
| 17 | Germany | 3 |
| 18 | Italy | 3 |
| 19 | Ghana | 2 |
| 20 | Malaysia | 2 |
| 21 | Tanzania | 2 |
| 22 | Argentina | 2 |
| 23 | Iraq | 2 |
| 24 | Nigeria. | 2 |
| 25 | Japan | 1 |
| 26 | Kuwait | 1 |
| 27 | Vietnam | 1 |
| 28 | Jordan | 1 |
| 29 | Ukraine | 1 |
| 30 | Saudi Arabia | 1 |
| 31 | Ethiopia | 1 |
| 32 | Togo | 1 |
| 33 | Burkina Faso | 1 |
