@article{art337,
  title = {An Open-Labeled, Multicentric, Clinical Trial to Substantiate the Safety and Efficacy for the Combination of Salbutamol, Etofylline and Bromhexine in the Treatment of COPD},
  doi = {10.23958/ijirms/vol03-i03/14},
  url = {https://mail.ijirms.in/index.php/ijecs/article/view/337}
}