1.
A. Sharma and A. R. Kansal. Brief Overview on Sustained Release Theophylline (SRT): An Older Drug for COPD . NAPR-V3 [Internet]. 2023 Jun. 13 [cited 2026 Jun. 3];:109-12. Available from: https://stm.bookpi.org/NAPR-V3/article/view/10886