The system eventually partially replaced the tramway network, which lasted for several more decades until its closure on 18 March 1961 (1961-03-18). However, the system itself has since been closed, on 10 January 1986 (1986-01-10).[citation needed]
Beeton, Frank (November 2011). "The time of the trolleybus". FOCUS On Transport and Logistics. FOCUS On Transport and Logistics. Retrieved 2 March 2012. Broken link
Pabst, Martin (1989). Tram & Trolley in Africa. Krefeld: Röhr Verlag. ISBN3-88490-152-4. (in English and German)
Patton, Brian (2004). Double-Deck Trolleybuses of the World: Beyond the British Isles. Brora, Sutherland: Adam Gordon. ISBN978-1-874422-50-1.