Seong Hyeok Lee and  Jin Wook Lee and  Bu Seog Ju and  Woo Young Jung,  Evaluation of Structural Behavior of Wide Sleepers on Asphalt Trackbed Due to Embedded Shear Keys.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2014, vol. 93(9). 1573 - 1576
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/9999304.