@article{Sola:99732,
      author        = "Sola, D. and Miguel, A. and Arias-Egido, E. and Peña,
                       J.I.",
      title         = "{Spectroscopy and near-infrared to visible upconversion of
                       er3+ ions in aluminosilicate glasses manufactured with
                       controlled optical transmission}",
      year          = "2021",
}