@article{Lamelas:168668,
      author        = "Lamelas, M.T. and Marinoni, O. and Hoppe, A. and Riva, J.
                       de la",
      title         = "{Suitability analysis for sand and gravel extraction site
                       location in the context of a sustainable development in the
                       surroundings of Zaragoza (Spain)}",
      year          = "2008",
}