WASET
    K. -H. Yang,  Pre- and Post-Analyses of Disruptive Quay Crane Scheduling Problem.   journal   = {International Journal of Industrial and Systems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2018, vol. 135(3). 279 - 282
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/10008781.