WASET
    Daniel Y. Abebe and  Jaehyouk Choi,  A New Type Safety-Door for Earthquake Disaster Prevention - Part I.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2015, vol. 99(3). 320 - 323
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/10000865.