Abdul Rahim Yacob and  Mohd Khairul Asyraf Amat Mustajab and  Nur Syazeila Samadi,  Calcination Temperature of Nano MgO Effect on Base Transesterification of Palm Oil.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2009, vol. 32(8). 408 - 412
    [viewed 14 October 2019]. Available from: https://publications.waset.org/pdf/4342.