TY  - RPRT
TI  - Sustained-release butorphanol microparticles.
AU  - H C Chang
AU  - L C Li
PY  - 2000
DO  - 10.1081/ddc-100101306
UR  - https://pubmed.ncbi.nlm.nih.gov/10900539/
ID  - 10900539
ER  -