@article{Magdalena:127742,
      author        = "Magdalena R. and Valero A. and Calvo G. and Alguacil F.J.
                       and López F.A.",
      title         = "{Simulation to recover niobium and tantalum from the tin
                       slags of the old penouta mine: A case study}",
      year          = "2021",
}