WASET
    P. Murugesan and  G. Venkateswaran and  V. A. Shanmuga Selvan,  Effect of Water Hardness and Free Residual Chlorine on Black Tea Brew.   journal   = {International Journal of Nutrition and Food Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2016, vol. 119(11). 721 - 724
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/10005890.