Muhammad Iqbal, Muhammad Ali Chang, Abid Mahmood, Muhammad Zafar Iqbal, Mahmood-ul- Hassan and Noor-ul- Islam
Asian Journal of Plant Sciences 2 ( 3 ): 325 - 330 , 2003
Muhammad Iqbal Baig, Muhammad Nawaz and Muhammad Zafar Iqbal
Pakistan Journal of Biological Sciences 1 ( 4 ): 274 - 276 , 1998