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2. Recovery of copper and cobalt from ancient slag;Bulut;Waste Manage. Res.,2006
3. Burke, H., 2001. Historical Archaeological Assessment of the Gulf Creek Copper Mine, near Barraba, NSW. NSW Department of Land and Water Conservation, 114 pp.
4. Ferric leaching of copper slag flotation tailings;Carranza;Min. Eng.,2009
5. Crowley, M., 1986. They came for copper: A history of Gulf Creek. Nandewar Historical Society (Barraba), 52 pp. https://www.barrabahistory.com/store/p6/They_Came_For_Copper_-_a_History_of_Gulf_Creek.html.