WASET
    M. M. Selim,  Reflection of Plane Waves at Free Surface of an Initially Stressed Dissipative Medium.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    April 2008, vol. 16(4). 241 - 248
    [viewed 18 April 2024]. Available from: https://publications.waset.org/pdf/13959.