@article{BeckStielLeupoldetal.2001,
  author    = {Michael Beck and H. Stiel and Dieter Leupold and Bernd Winter and D. Pop and U. Vogt and Christian Spitz},
  title     = {Evaluation of the energetic position of the lowest excited singlet state of ß-carotene by NEXAFS and photoemission spectroscopy},
  year      = {2001},
}