@inproceedings{qin_hu_zhao_2001, 
  title={<title>Automated classification of stellar spectra based on PCA and wavelet transform</title>}, 
  DOI={10.1117/12.441649}, 
  publisher={SPIE}, 
  author={Qin and Hu and Zhao}, 
  editor={Shen and Pankanti and Wang}, 
  year={2001}, 
  month={Sep}
  }