Mbwambo, H., P. Mella, and K. Lekaki. “Trypanosomiasis Chemotherapy: Further Observations on a Strain of Trypanosoma Congolense Resistant to Diminazene Aceturate”. Tanzania Veterinary Journal, vol. 8, no. 4, Dec. 1988, pp. 45-51, http://tvj.sua.ac.tz/vet2/index.php/TVJ/article/view/327.