| 1 | |
| Researcher: | Roy, Ratna |
| University: | Ranchi University |
| Language: | English |
| 2 | |
| Researcher: | Ratna, S L |
| University: | Indian Institute of Science |
| Language: | English |
| 3 | |
| Researcher: | Sthapit, Yoga Ratna |
| Guide: | Dutta, Sunil |
| University: | University of Lucknow |
| Language: | English |