| 1 | ||
| Researcher: | Varkey, P J | |
| Guide: | Joseph, T M | |
| University: | Mahatma Gandhi University, Kottayam | |
| Language: | English | |
| Shodhganga | ||
| 2 | ||
| Researcher: | Dhanekula, Siva Sankara Rao | |
| Guide: | Rao, B Sambasiva | |
| University: | Acharya Nagarjuna University, Guntur | |
| Language: | English | |