1. Successful treatment of persistent extreme dyspnea, "status asthmaticus"-use of theophylline ethylene diamine (aminophylline USP) intravenously;Herrmann, G.R.; Aynesworth, M.B.; Martin, J.;Lab Clin Med,1937
2. The action of theophylline with ethylene diamine on intrathecal and venous pressures in cardiac failure and on bronchial obstruction in cardiac failure and in bronchial asthma;Greene, J.A.; Paul, W.D.; Faller, A.E.;JAMA
3. History of the introduction of theophylline into the treatment of asthma;May, C.D.;Clin Allergy,1974
4. The clinical and pharmacological history of theophylline: first report on the bronchospasmolytic action in man by SR Hirsch in Frankfurt (Main);Schultze-Werninghaus, G.; Meijer-Sydow, J.;Clin Allergy,1982
5. A study of antispasmodic drugs on the bronchus. Pharmacol Exp Ther 1921; 18;Macht, D.I.; Ting, G.C.