WASET
    Daniela I. Borissova and  Ivan C. Mustakerov,  An Algorithm for an Optimal Staffing Problem in Open Shop Environment.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2013, vol. 76(4). 856 - 860
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/1149.