Carolin Mayer, Geofrey Soka and Mike Picker. "The importance of monkey beetle (Scarabaeidae: Hopliini) pollination for Aizoaceae and Asteraceae in grazed and ungrazed areas at Paulshoek, Succulent Karoo, South Africa" Journal of Insect conservation Vol. 10 Iss. 4 (2006)
Available at: http://works.bepress.com/geofrey_soka/6/