H. Iranmanesh and  M. R. Skandari and  M. Allahverdiloo,  Finding Pareto Optimal Front for the Multi-Mode Time, Cost Quality Trade-off in Project Scheduling.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2008, vol. 14(2). 110 - 114
    [viewed 17 April 2021]. Available from: https://publications.waset.org/pdf/6911.