@misc{indiciae19810c796fbb,
  title = {[Determination of six main components in compound theophylline tablet by convolution curve method after prior separation by column partition chromatography]},
  author = {Zhang, S. Y. and Wang, G. F. and Wu, Y. T. and Baldwin, K. M.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/20050000539},
  note = {Source identifier: 20050000539}
}