Muhammad, Syed, Kholiq-u z- Zaman, K Simin, Mustafa khan, and Shameei khan. 2001. “ANTIMICROBIAL ACTIVITY AND PHYTOTOXICITY OF STEROLS FROM CHARA WALLICHII A. BR. (CHAROPHYTA)”. Biological Sciences - PJSIR 44 (5):301-4. http://v2.pjsir.org/index.php/biological-sciences/article/view/1956.