C. Michael Hogan, Mark L. Cooke and Helen Murray, The Waterberg Biosphere, Lumina Technologies, 22 May 2006. "Lumaw". Archived from the original on 1 March 2012. Retrieved 10 June 2010.
C. Michael Hogan, Mark L. Cooke and Helen Murray, The Waterberg Biosphere, Lumina Technologies, 22 May 2006. "Lumaw". Archived from the original on 1 March 2012. Retrieved 10 June 2010.