| 1 | ||
| Researcher: | Ananthakrishna Pillai, A | |
| Guide: | Sankaran, C R | |
| University: | Savitribai Phule Pune University | |
| Language: | English | |
| Shodhganga | ||
| 2 | ||
| Researcher: | Chang, Cikumla | |
| Guide: | Khyriem, B. | |
| University: | North-Eastern Hill University, Shillong | |
| Language: | English | |