@article{KlierKumke2015,
  author    = {Dennis Tobias Klier and Michael Uwe Kumke},
  title     = {Upconversion Luminescence Properties of NaYF4:Yb:Er Nanoparticles Codoped with Gd3+},
  journal   = {The journal of physical chemistry : C, Nanomaterials and interfaces},
  volume    = {119},
  number    = {6},
  pages     = {3363 -- 3373},
  doi       = {10.1021/jp5103548},
  year      = {2015},
}