Masamitsu Chikaraishi and  Mutsuto Kawahara,  An Identification Method of Geological Boundary Using Elastic Waves.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2010, vol. 47(11). 356 - 362
    [viewed 08 May 2024]. Available from: https://publications.waset.org/pdf/4466.