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- [2] SLOW-RELEASE THEOPHYLLINE AND AMINOPHYLLINE IN CHRONIC-BRONCHITIS BRITISH JOURNAL OF DISEASES OF THE CHEST, 1981, 75 (03): : 317 - 317
- [3] SUSTAINED-RELEASE THEOPHYLLINE MEDICAL LETTER ON DRUGS AND THERAPEUTICS, 1981, 23 (23): : 97 - 98
- [4] SLOW RELEASE THEOPHYLLINE IN CHRONIC-BRONCHITIS - A COMPARATIVE-STUDY BRITISH JOURNAL OF CLINICAL PRACTICE, 1986, 40 (06): : 245 - 250