1. Apnoeic attacks in the newborn treated with aminophylline;Kuzemko;Arch Dis Child,1973
2. Prevention of apnea and bradycardia in low-birth-weight infants;Shannon;Pediatrics,1975
3. Treatment of severe apnea in prematures with orally administered theophylline;Uauy;Pediatrics,1975
4. Determination of theophylline and its metabolites in human urine and serum by high-pressure liquid chromatography;Thompson;J Lab Clin Med,1974
5. Analysis of theophylline in biological fluids by HPLC;Jusko,1975