| 1 | ||
| Researcher: | Mathew, P E | |
| Guide: | Sundaresan, P K | |
| University: | Mahatma Gandhi University, Kottayam | |
| Language: | English | |
| Shodhganga | ||
| 2 | ||
| Researcher: | Gudapati, Venkata Subba Rao | |
| Guide: | Reddy, R Nagi | |
| University: | Acharya Nagarjuna University, Guntur | |
| Language: | English | |