1. Feldberg W (1967) John Henry Gaddum, Biographical Memoirs of Fellows of the Royal Society13, 57.
2. Gaddum JH (1964) in ?Drugs in our Society?, pp 17?26, The Johns Hopkins Press, Baltimore, Maryland.
3. von Euler US (1936) Biochim. Biophys. Acta499, 48.
4. Ferreira SH & Vane JR (1967) Nature (Lond.)216, 868.
5. Willis AL (1969) J. Pharm. Pharmacol.21, 126.