| 1 | ||
| Researcher: | Usha Devi, R | |
| Guide: | Kattakkayam, Jacob John | |
| University: | University of Kerala | |
| Language: | English | |
| 2 | ||
| Researcher: | Usha Devi K | |
| Guide: | Nadaraja Panikkar M V | |
| University: | University of Kerala | |
| Language: | English | |
| Shodhganga | ||
| 3 | ||
| Researcher: | Usha Devi K G | |
| Guide: | Rajendran G | |
| University: | University of Kerala | |
| Language: | English | |
| Shodhganga | ||