European Journal of Operational Research
European Journal of Operational Research > 2018 > 264 > 1 > 364-369
European Journal of Operational Research > 2018 > 267 > 1 > 381-392
European Journal of Operational Research > 2018 > 264 > 1 > 364-369
European Journal of Operational Research > 2018 > 267 > 1 > 381-392