1. Monitoring of illegal activity and law enforcement in African conservation areas;Bell,1985
2. Illegal activity and law enforcement in the central Luangwa Valley, Zambia, from 1979 to 1992;Bell;Pachyderm,1992
3. Northern Ghana elephant survey;Bouché;Pachyderm,2007
4. Dublin, H.T., Jachmann, H., 1992. The impact of the ivory ban on illegal hunting of elephants in six range states. World Wide Fund for Nature International Research Report, Gland, Switzerland.
5. Jachmann, H., 1998. Monitoring illegal wildlife use and law enforcement in African savannah rangelands. Environmental Council of Zambia Publication, Lusaka, Zambia.