@article{ perez2005pre,
  title = {Pre-processing a Network Design Problem using GRASP},
  author = {Perez, F and Alvarez, A and de Alba, K},
  journal = {WSEAS TRANSACTIONS ON MATHEMATICS},
  volume = {4},
  number = {2},
  pages = {95},
  year = {2005},
  publisher = {WSEAS Press},
  keywords = {pisis}
}

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