Sukalpa Das, Md. Atiqur Rahman Khokon, Md. Manzurul Haque and M. Ashrafuzzaman
Pakistan Journal of Biological Sciences 4 ( 12 ): 1500 - 1502 , 2001
Nazrul Islam, Bimal kumar Pramanik, Md. Atiqur Rahman Khokon and M. Ashrafuzzaman
Pakistan Journal of Biological Sciences 4 ( 11 ): 1361 - 1363 , 2001