@article{GruszeckiStielNiedzwiedzkietal.2005,
  author    = {Gruszecki, Wieslaw I. and Stiel, H. and Niedzwiedzki, Dariusz and Beck, Michael and Milanowska, J. and Lokstein, Heiko and Leupold, Dieter},
  title     = {Towards elucidating the energy of the first excited singlet state of xanthophyll cycle pigments investigated by x-ray absorption spectroscopy},
  year      = {2005},
  language  = {en}
}
@article{BeckStielLeupoldetal.2001,
  author    = {Beck, Michael and Stiel, H. and Leupold, Dieter and Winter, Bernd and Pop, D. and Vogt, U. and Spitz, Christian},
  title     = {Evaluation of the energetic position of the lowest excited singlet state of ß-carotene by NEXAFS and photoemission spectroscopy},
  year      = {2001},
  language  = {en}
}