@misc{indiciae037fcad3af67,
  title = {Sustained-release butorphanol microparticles.},
  author = {H C Chang and L C Li},
  year = {2000},
  doi = {10.1081/ddc-100101306},
  url = {https://pubmed.ncbi.nlm.nih.gov/10900539/},
  note = {Source identifier: 10900539}
}