WASET
    P. R. Rahul and  A. Kannan,  A DOE Study of Ultrasound Intensified Removal of Phenol .   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2015, vol. 103(7). 949 - 954
    [viewed 05 May 2024]. Available from: https://publications.waset.org/pdf/10005949.