@article{kim_lee_hong_choi_lee_park_2017, 
  title={Estimation of Surface NO2 Volume Mixing Ratio in Four Metropolitan Cities in Korea Using Multiple Regression Models with OMI and AIRS Data}, 
  DOI={10.3390/rs9060627}, 
  publisher={MDPI AG}, 
  author={Kim and Lee and Hong and Choi and Lee and Park}, 
  year={2017}, 
  month={Jun}
  }