Nisar Ali Shah, S. Mohammad Khair, M. Afzal and Manzoor Ahmad Kasi
Asian Journal of Plant Sciences 1 ( 4 ): 373 - 375 , 2002
Ghazala Nasim, Shahid Hameed Malik, Rukhsana Bajwa, M. Afzal and Salman Wajid Mian
Journal of Biological Sciences 1 ( 12 ): 1130 - 1133 , 2001