Narayan Roy, Naoko Okai and Yoshiyuki Kamio
Pakistan Journal of Biological Sciences 4 ( 8 ): 1006 - 1011 , 2001
Niranjan Kumar Sana, Narayan Roy, Kamal Krishna Biswas and Entazul M. Huque
Pakistan Journal of Biological Sciences 4 ( 2 ): 233 - 236 , 2001