@misc{Juestel2012,
  author    = {T. J{\"u}stel},
  title     = {Rare Earth Ions - The Vitamins of Phosphors, Philips Lighting Maarheeze, The Netherlands, 02. Mai 2012},
  institution = {Chemieingenieurwesen (CIW)},
  type      = {lecture},
  year        = {2012},
}