Sharif, Mahjabeen, Bushra Tayyaba Khan, Salman Bakhtiar, and Mubashir Sharif. 2014. “IPRATROPIUM ATTENUATES INSULIN INDUCED TRACHEAL SMOOTH MUSCLE CONTRACTION OF GUINEA PIG IN VITRO: Ipratropium”. Pakistan Armed Forces Medical Journal 64 (1): 114-18. https://pafmj.org/PAFMJ/article/view/571.