Epstein S, Manning C, Ashley M, et al:  Survey of the clinical use of pressurized aerosol inhalers . Can Med Assoc J 1979;;120:813-816.
Crompton GK:  Problems patients have using pressurized aerosol inhalers . Eur J Respir Dis 1982;;63(
(suppl 119)
):101-104.
Orehek J, Gayard P, Grimand C, et al:  Patient error in use of bronchodilator metered aerosols . Br Med J 1976;;1:76.
Shim C, Williams M:  The adequacy of inhalation of aerosol from cannister nebulizers . Am J Med 1980;;69:891-894.
Patterson I, Crompton G:  Use of pressurized aerosols by asthmatic patients . Br Med J 1976;;1:76-77.
Lee HS:  Proper aerosol inhalation technique for delivery of asthma medications . Clin Pediatr 1983;;22:440-443.
Carr D, Dolovich M, McCormack D, et al:  Design and characteristics of a portable breath actuated particle size selective medical aerosol inhaler . J Aerosol Sci 1982;;13:1-7.
Dixon WJ (ed): BMDP Statistical Software . Berkeley, Calif, University of California Press, 1983;.
Konig P:  Spacer devices used with metered dose inhalers . Chest 1985;;88:276-284.
Levison H, Reilly PA, Worsley GH:  Spacing devices and metered-dose inhalers in childhood asthma . J Pediatr 1985;;107:662-668.
Lindgren SD, Formgren H, Moren F:  Improved aerosol therapy of asthma . Eur J Respir Dis 1980;;61:56-61.
Cushley M, Lewis R, Tattersfield A:  Comparison of three techniques of inhalation on the airway response to terbutaline . Thorax 1983;;38: 908-913.
Pedersen S:  Aerosol treatment of bronchoconstriction in children, with or without a tube spacer . N Engl J Med 1983;;308:1328-1330.
Kjellman NIM, Hidinger KG:  Improved efficacy of pressurized terbutaline aerosol in childhood asthma using a spacer . Opucscula Med 1981;;26:47-48.
Ellul-Micallef R, Moren F, Wetterlin K, et al:  Use of a special inhaler attachment in asthmatic children . Thorax 1980;;35:620-623.
Tobin M, Jenouri G, Ignascon D, et al:  Response to bronchodilator drug administration by a new reservoir aerosol delivery system and a review of other auxiliary systems . Am Rev Respir Dis 1982;;126:670-675.
Rivlin J, Mindorff C, Reilly P, et al:  Pulmonary response to a bronchodilator delivered from three inhalation devices . J Pediatr 1984;;104: 470-473.
Hodges IGC, Milner AD, Stokes GM:  Assessment of a new device for delivering aerosol drugs to asthmatic children . Arch Dis Child 1981;;56:787-789.
Van Asperen PP, Mellis CM, South RT, et al:  The tube spacer in children with asthma . Aust Paediatr J 1981;;17:56-58.
Gurwitz D, Levison H, Mindorff C, et al:  Assessment of a new device (Aerochamber) for use with aerosol drugs in asthmatic children . Ann Allergy 1983;;50:166-170.
Oliver CH, Riedel F, Simpson H:  Terbutaline in asthmatic children . Br J Clin Pract 1982;;36:157-159.
Becker AB, Simons FE, Benoit T, et al:  Terbutaline by metered-dose inhaler: Conventional inhaler versus tube spacer for children with asthma . Ann Allergy 1985;;55:724-728.
Dolovich M, Eng P, Ruffin R, et al:  Clinical evaluation of a simple demand inhalation MDI aerosol delivery device . Chest 1983;;84:36-41.
Newman SP, Pavia D, Clark SW:  Simple instruction for using pressurized aerosol bronchodilators . J R Soc Med 1980;;73:776-779.