Thomas V. Orum, Athar Nadeem, Larry J.Stowell and Merritt R. Nelson
Journal of Biological Sciences 1 ( 1 ): 9 - 12 , 2001
Athar Nadeem, Zhongguo Xiong and Merritt Nelson
Pakistan Journal of Biological Sciences 2 ( 4 ): 1317 - 1321 , 1999