@article{YangVardenyKoehleretal.2004,
  author    = {C. Yang and Z. V. Vardeny and Anna K{\"o}hler and M. Wohlgenannt and Mohammed K. Al-Suti and Muhammad S. Khan},
  title     = {Spectroscopic study of spin-dependent exciton formation rates in pi-conjugated semiconductors : Comparison with electroluminescence techniques},
  year      = {2004},
}