@article{Constantinescu:168162,
      author        = "Constantinescu, G. and Rasekh, S.H. and Torres, M.A. and
                       Chocarro, C. and Díez, J.C. and Madre, M.A. and Sotelo,
                       A.",
      title         = "{Influence of Ca substitution by Mg on the Ca3Co 4O9
                       performances}",
      year          = "2014",
}