@article{EncinasFerrer:86524,
      author        = "Encinas Ferrer, Carlos and Hernández Rodríguez, Clemente
                       and Usón Sardaña, Antonio and Valderrey Villar, Francisco
                       Javier",
      title         = "{The world production and trade of rare earth elements:
                       the position of the pacific area}",
      year          = "2014",
}