Mehdi Sedighi, Mostafa Ghasemi, Sedky H.A. Hassan, Wan Ramli Wan Daud, Manal Ismail, Elgorban Abdallah.  (2012).  Process optimization of batch biosorption of lead using Lactobacillius bulgaricus in an aqueous phase system using response surface methodology.  - World Journal of Microbiology and Biotechnology.  28:2047-2055. 

Wan N. R. W. Isahak, Manal Ismail, Jamaliah M. Jahim, Jumat Salimon, Mohd A. Yarmo.  (2012).  Characterisation and performance of three promising heterogeneous catalysts in transesterification of palm oil.  - Chemical Papers.  66(3):178-187. 

Zahira Yaakob, Irwan Sukma Bin Sukarman, Binitha Narayanan, Siti Rozaimah Sheikh Abdullah, Manal Ismail.  (2012).  Utilization of palm empty fruit bunch for the production of biodiesel from Jatropha curcas oil.  - Bioresource Technology.  104:695-700.