Rohit Kumar Shrivastava and  Amalia Thomas and  Nathalie Vriend and  Stefan Luding,  Long Wavelength Coherent Pulse of Sound Propagating in Granular Media.   journal   = {International Journal of Aerospace and Mechanical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2017, vol. 130(10). 1719 - 1726
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10008153.