| 1 | ||
| Researcher: | Sobhana, S | |
| Guide: | Balakrishnan Nair, N | |
| University: | University of Kerala | |
| Language: | English | |
| 2 | ||
| Researcher: | Sobhana amma, R | |
| Guide: | Haq, M A | |
| University: | University of Calicut | |
| Language: | English | |
| Shodhganga | ||
| 3 | Studies on the biology of spinyeel, Mastacembelus Guentheri Day(Pisces-Mastacembelidae) | |
| Researcher: | Sobhana Kumar, K | |
| Guide: | Padmanbhan, K G | |
| University: | University of Kerala | |
| Language: | English | |
| 4 | ||
| Researcher: | Sobhana, K A | |
| Guide: | Benny, T M | |
| University: | University of Calicut, Kozhikode | |