M. Aslam and  Farrukh and  A. R. Gardezi and  Nasir Hayat,  Design, Development and Analysis of Automated Storage and Retrieval System with Single and Dual Command Dispatching using MATLAB.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2009, vol. 36(12). 1455 - 1459
    [viewed 15 October 2019]. Available from: https://publications.waset.org/pdf/1827.