saiful arif abdullah, norhayati ahmad, mohammad shuhaimi othman, ahmad abas kutty, zulfahmi ali rahman.  (2008).  3rd regional symposium on enviroment and natural resources "conservation for a green future".  - .  135. 

dr. saiful arif abdullah, prof. dr. mohd shafeea leman.  (2007).  lestari abstracts : no 3 kolokium siswazah lestari 2005/2006.  - .  25.