V. Kahya and  A. Birinci and  R. Erdol,  Frictionless Contact Problem Between Two Orthotropic Elastic Layers .   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2007, vol. 1(1). 7 - 13
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/2756.