Universidad de Zaragoza Repository

@article{MartínezPérez:44081,
      author        = "Martínez Pérez, Concepción María and Gallego Tapia,
                       María Pilar and Otal Cinca, Javier and Bernal Acero,
                       Eulalio and Elduque Palomo, Alberto Carlos and Ponce
                       Guajardo, Julia",
      title         = "{}",
      year          = "2011",
}