| 1 | |
| Researcher: | Dudh Nath Singh |
| University: | Banaras Hindu University |
| Language: | English |
| 2 | |
| Researcher: | Badri Nath Singh |
| University: | University of Lucknow |
| Language: | English |
| 3 | |
| Researcher: | Kashi Nath Singh |
| Guide: | Guru, D D |
| University: | Ranchi University |
| Language: | English |