Qamar Zaman, Khizar Hayat, Nazir Hussain and Abdul Aziz
Asian Journal of Plant Sciences 1 ( 5 ): 540 - 541 , 2002
Muhammad Bashir Ahmed, Khizar Hayat, Qamar Zaman and Nazeer Hussain Malik
Journal of Biological Sciences 1 ( 4 ): 209 - 211 , 2001