TY  - RPRT
TI  - Controlled release theophylline.
AU  - S Riegelman
AU  - J W Jenne
PY  - 1980
DO  - 10.1378/chest.78.2.250
UR  - https://pubmed.ncbi.nlm.nih.gov/7398412/
ID  - 7398412
ER  -