Jirakarn Nantapipat and  Apanee Luengnaruemitchai and  Sujitra Wongkasemjit,  A Comparison of Dilute Sulfuric and Phosphoric Acid Pretreatments in Biofuel Production from Corncobs.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2013, vol. 76(4). 197 - 201
    [viewed 21 September 2019]. Available from: https://publications.waset.org/pdf/3588.