@article{Romero:151528,
      author        = "Romero, E. and Soto, R. and Durán, P. and Herguido, J.
                       and Peña, J.A.",
      title         = "{Molibdenum addition to modified iron oxides for improving
                       hydrogen separation in fixed bed by redox processes}",
      year          = "2012",
}