1. Caffeine content of common beverages;Bunker;J. Am. Diet. Assoc,1979
2. Caffeine—its identity, dietary sources, intake, and biological effects;Graham;Nutr. Rev,1978
3. Drug distribution in pregnancy;Mirkin,1973
4. Placental transfer of pharmacologically active molecules;Mirkin,1976
5. Caffeine secretion into breast milk;Tyrala;Arch. Dis. Child,1979