| 1 | ||
| Researcher: | Usha, L | |
| Guide: | Majhi, S N | |
| University: | Indian Institute of Technology-madras | |
| Language: | English | |
| 2 | ||
| Researcher: | Usha, L | |
| Guide: | Balachandran, V | |
| University: | Alagappa University | |
| Language: | English | |
| Shodhganga | ||
| 3 | ||
| Researcher: | Usha, L R | |
| Guide: | Nair, P R Gopinathan | |
| University: | University of kerala | |
| Language: | English | |
| 4 | ||
| Researcher: | Soyeliya, Usha L. | |
| Guide: | Sardhara, B. L. | |
| University: | Saurashtra University | |
| Language: | English | |
| Shodhganga | ||