@article{Constantinescu:168063,
      author        = "Constantinescu, G. and Rasekh, Sh. and Torres, M.A. and
                       Diez, J.C. and Madre, M.A. and Sotelo, A.",
      title         = "{Effect of Sr substitution for Ca on the Ca3Co4O 9
                       thermoelectric properties}",
      year          = "2013",
}