| 1 | ||
| Researcher: | Bhatnagar, Satya Van | |
| University: | Panjab University | |
| Language: | English | |
| Shodhganga | ||
| 2 | ||
| Researcher: | Kesava Panicker, K | |
| University: | University of Kerala | |
| Language: | English | |
| 3 | ||
| Researcher: | Nigam, Madan Lal | |
| University: | Vikram University | |
| Language: | Hindi | |