Universidad de Zaragoza Repository

@article{PérezCalle:44317,
      author        = "Pérez Calle, Begoña and Zevallos Avilés, Günther
                       Antonio and Zubiaurre Eizaguirre, Julieta María and Pérez
                       Ximenez De Embún, Domingo",
      title         = "{}",
      year          = "2011",
}