WASET
    Wu Qinglong and  Zhou Qicai and  Xiong Xiaolei and  Zhang Richeng ,  Periodic Topology and Size Optimization Design of Tower Crane Boom.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2017, vol. 128(8). 561 - 567
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/10007635.