| 1 | |
| Researcher: | Mishra, Bhagirath |
| University: | University of Lucknow |
| Language: | Hindi |
| 2 | |
| Researcher: | Sarda, Bhagirath |
| University: | Osmania University |
| Language: | Hindi |
| 3 | |
| Researcher: | Yadav, Bhagirath Prasad |
| University: | Tilka Manjhi Bhagalpur University |
| Language: | Hindi |