1. Caffeine content of common beverages;Bunker;J Am Diet Assoc,1979
2. Update to review of caffeine studies;Collins;FDA By-Lines,1981
3. Placental transfer of pharmacologically active molecules;Mirkin,1976
4. The effect of pregnancy on the pharmacokinetics of caffeine;Knutti;Arch Toxicol,1982
5. Placental transfer of drugs;Horning,1973