C. A. Akaash Emmanuel Raj and  V. R. Sanal Kumar,  Conceptual Design of a Customer Friendly Variable Volume and Variable Spinning Speed Washing Machine.   journal   = {International Journal of Aerospace and Mechanical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2019, vol. 150(6). 393 - 398
    [viewed 16 November 2019]. Available from: https://publications.waset.org/pdf/10010439.