1. Historical review of the use of parasympatholytic agents in the treatment of respiratory disorders;Gandevia;Postgrad Med J,1975
2. Anticholinergic, antimuscarinic bronchodilators;Gross;Am Rev Respir Dis,1984
3. Anticholinergic agents;Ziment;Clin Chest Med,1986
4. Role of anticholinergics in asthma;Weber;Ann Allergy,1990
5. The use of anticholinergics in asthma;Beakes;J Asthma,1997