| 1 | |
| Researcher: | Nigam, S D |
| University: | Dr Bhimrao Ambedkar University |
| Language: | English |
| 2 | |
| Researcher: | Nigam, G D |
| University: | Indian Institute of Technology-Madras |
| Language: | English |
| 3 | |
| Researcher: | Nigam, K D P |
| Guide: | Vasudevan, K |
| University: | University of Mumbai |
| Language: | English |