Gordon J, Panos RJ (March 2010). "Inhaled albuterol/salbutamol and ipratropium bromide and their combination in the treatment of chronic obstructive pulmonary disease". Expert Opinion on Drug Metabolism & Toxicology. 6 (3): 381–92. doi:10.1517/17425251003649549. PMID20163324. S2CID31806856.
Gordon J, Panos RJ (March 2010). "Inhaled albuterol/salbutamol and ipratropium bromide and their combination in the treatment of chronic obstructive pulmonary disease". Expert Opinion on Drug Metabolism & Toxicology. 6 (3): 381–92. doi:10.1517/17425251003649549. PMID20163324. S2CID31806856.
Gordon J, Panos RJ (March 2010). "Inhaled albuterol/salbutamol and ipratropium bromide and their combination in the treatment of chronic obstructive pulmonary disease". Expert Opinion on Drug Metabolism & Toxicology. 6 (3): 381–92. doi:10.1517/17425251003649549. PMID20163324. S2CID31806856.