Abdulali Ben Saleh and  Mohamed Abudabbus,  Removal of Methylene Blue Dye Using Roselle Petals from Aqueous Solutions.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2013, vol. 78(6). 340 - 343
    [viewed 10 May 2024]. Available from: https://publications.waset.org/pdf/7609.