G Lönnerholm, T Foucard, B Lindström
Lönnerholm G, Foucard T, Lindström B.
Combined treatment with sustained-release theophylline and beta2-adrenoceptor-stimulating agents in chronic childhood asthma.
Br Med J (Clin Res Ed) 1981; 282 :1029
doi:10.1136/bmj.282.6269.1029