| 1 | |
| Researcher: | Dass, P Muralikrishna |
| University: | Sri Venkateswara University |
| Language: | English |
| 2 | |
| Researcher: | Rao, V P |
| University: | Banaras Hindu University |
| Language: | English |
| 3 | |
| Researcher: | Achan, P Dhananjayan Kuttan |
| University: | University of Madras |
| Language: | English |