@article{Mertins2017,
  author    = {Mertins, H.-Ch.},
  title     = {Wie gut sch{\"u}tzt meine Sonnenbrille?},
  series = {Concept Ophthalmologie},
  volume    = {6},
  journal   = {Concept Ophthalmologie},
  year      = {2017},
  language  = {mul}
}
@article{Mertins2017,
  author    = {Mertins, H.-Ch.},
  title     = {Sonnenbrillencheck},
  series = {Optic und vision},
  volume    = {7},
  journal   = {Optic und vision},
  issn      = {1436-2155},
  pages     = {40 -- 41},
  year      = {2017},
  language  = {mul}
}