@article{oh_lee_seo_kim_yoon_2011, 
  title={Synthesis and Characterization of 9,9'-Diethyl-2-diphenylaminofluorene Derivatives as Blue Fluorescent Materials for OLEDs}, 
  volume={32}, 
  DOI={10.5012/bkcs.2011.32.5.1593}, 
  publisher={Korean Chemical Society}, 
  author={Oh and Lee and Seo and Kim and Yoon}, 
  year={2011}, 
  month={May}
  }