TY  - RPRT
TI  - Multiple-layer, direct-compression, controlled-release system: in vitro and in vivo evaluation.
AU  - R A Fassihi
AU  - W A Ritschel
PY  - 1993
DO  - 10.1002/jps.2600820715
UR  - https://pubmed.ncbi.nlm.nih.gov/8360851/
ID  - 8360851
ER  -