Mahjabeen Sharif, Bushra Tayyaba Khan, Mubashir Sharif, and Afsheen Sharif. 2014. “Preventive Effects of Ipratropium and Salbutamol Against Insulin Induced Tracheal Smooth Muscle Contraction in Guinea Pig Model: Ipratropium and Salbutamol Inhibit Tracheal Contractions”. Iranian Journal of Pharmaceutical Sciences 10 (3):55-62. https://doi.org/10.22037/ijps.v10.40815.