Syeda Nasreen, M. Yousaf, Akbar S. Mohmand and M. Ashraf Mailk
Asian Journal of Plant Sciences 1 ( 2 ): 210 - 212 , 2002
Syeda Nasreen, Bakht Roidar Khan and Akbar Shah Mohmand
Pakistan Journal of Biological Sciences 3 ( 12 ): 2003 - 2004 , 2000