| 21 | |
| Researcher: | Singh, Onkar Nath |
| University: | Banaras Hindu University |
| Language: | English |
| 22 | |
| Researcher: | Singh, Onkar Nath |
| University: | Banaras Hindu University |
| Language: | English |
| 23 | |
| Researcher: | Singh, Onkar Prasad |
| Guide: | Jha, Bishwanath |
| University: | Lalit Narayan Mithila University |
| Language: | English |
| 24 | |
| Researcher: | Singh, Onkar Nath |
| Guide: | Chauhan, Y S |
| University: | Narendra Deva University of Agriculture and Technology |
| Language: | English |