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    Mehdi Seifbarghy and  Keyvan Roshan,  A Bi-Objective Preventive Healthcare Facility Network Design with Incorporating Cost and Time Saving.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2012, vol. 61(1). 282 - 285
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/1859.