@article{tanaka_nagai_1925, 
  title={Studies on Naphthenic Acids. X. Composition of Naphthenic Acids derived from Nishiyama Kerosene and "Neutral" Distillates.}, 
  volume={28}, 
  DOI={10.1246/nikkashi1898.28.9_947}, 
  publisher={The Chemical Society of Japan}, 
  author={Tanaka and Nagai}, 
  year={1925}
  }