1. Hamilton Wright, ‘The International Opium Conference’, The American Journal of International Law, Volume 6, 1912, p. 872.
2. Vladimir Kusevic, ‘Drug Abuse Control and International Treaties’, Journal of Drug Issues, Volume 7, No. 1, 1977, pp. 35–6.
3. Editorial Comment, ‘The International Opium Conference’, The American Journal of International Law, Volume 5, 1911, p. 467.
4. International Opium Commission, Official Documents, Supplement to the American Journal of International Law, Volume 3, 1909, pp. 275–6.
5. Cited in R.L. Gupta, Law of Opium and Opium Smuggling (Allahabad: Law Book Co., 1971), p. 151.