| 21 | ||
| Researcher: | Sharan, Shankar | |
| Guide: | Yadav, P M | |
| University: | V. B. S. Purvanchal University | |
| Shodhganga | ||
| 22 | ||
| Researcher: | Yadav, Sugreev | |
| Guide: | Yadav, P M | |
| University: | V. B. S. Purvanchal University | |
| Shodhganga | ||
| 23 | ||
| Researcher: | Singh, Balram | |
| Guide: | Yadav, P M | |
| University: | V. B. S. Purvanchal University | |
| Shodhganga | ||
| 24 | ||
| Researcher: | Singh, Kanchana | |
| Guide: | Yadav, P M | |
| University: | V. B. S. Purvanchal University | |
| Shodhganga | ||