@article{
  author = {Abrishamifar, S. Amir},
  title = {ORE extraction and blending optimization model in poly- metallic open PIT mines by chance constrained one-sided goal programming},
  journal = {Journal of Industrial Engineering International},
  year = {2011},
  volume = {7},
  number = {15},
  pages = {60-67},
  doi = {}
}