@article{GaertnerBelloni,
  author    = {Alexander G{\"a}rtner and Paola Belloni},
  title     = {Optical designs to improve LED lighting efficiency of medical endoscopes},
  series = {LED Professional Review},
  number    = {69},
  issn      = {1993-890X},
  pages     = {70 -- 74},
  language  = {en}
}