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2. Interaction between isoprcnaline and aminophvlline in asthma;Campbell I. A.;Thorax,1976
3. A rapidly dissolving theophylline tablet;Cohen A.;Curr. Ther. Res.,1975
4. Resistance to β‐adrenorcceptor stimulants (a possible explanation for the rise in asthma deaths);Connolly M. E.;Brit. J. Pharmac.,1971
5. Letter: Aerosols and asthma deaths.