WASET
    S. Reaz Ahmed and  M. S. Kaiser,  Wet Sliding Wear and Frictional Behavior of Commercially Available Perspex.   journal   = {International Journal of Mechanical and Materials Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2017, vol. 131(11). 1776 - 1780
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/10008136.