1. Murray CJ Styblo K Rouillon A. Tuberculosis in developing countries: burden, intervention and cost. Bull Int Union Tuberc Lung Dis 1990;65:6–24.
2. Overview and Epidemiologic Assessment of the Current Global Tuberculosis Situation with an Emphasis on Control in Developing Countries
3. Hill DR. Immunizations for foreign travel. Yale J Biol Med 1992;65:293–315.
4. Veen J. BCG-vaccinate voor reizigers naar de tropen. Ned Tijdschr Geneeskd 1987;131:811–812.
5. Walker E Williams G. ABC of healthy travel. 3rd Ed. British Medical Journal, 1989.