1. Sex-related differences in theophylline pharmacokinetics;Nafziger;Europ. J. Clin. Pharmacol.,1989
2. Theophylline absorption from sustained-release products etc;Hurwitz;J. Clin. Pharmacol.,1987
3. Merck Index;O'Neil,2001
4. Drugs Used in the Treatment of Asthma;Undem,2001