Aparajita Goswami and  Mihir K Purkait,  Defluoridation of Water by Schwertmannite.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2013, vol. 73(1). 44 - 49
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/8474.