| 21 | ||
| Researcher: | Geetha R Puthussery | |
| Guide: | Venugopalan P | |
| University: | University of Kerala | |
| Shodhganga | ||
| 22 | ||
| Researcher: | Racil Jeya Geetha, R | |
| Guide: | Mahendran, M and Thampi Thanka Kumaran | |
| University: | Manonmaniam Sundaranar University | |
| Language: | English | |
| Shodhganga | ||