1. Albrecht, M., Berke, H., Eichhorn, B., Frank, T., Kuper, R., Prill, S., Vogelsang, R., & Wenzel, S. (2001). Oruwanje 95/1: A late Holocene stratigraphy in northwestern Namibia. Cimbebasia, 17, 1–22.
2. Alley, R. B. (2000). The Younger Dryas cold interval as viewed from central Greenland. Quaternary Science Reviews, 19, 213–226.
3. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series #2004-013;RB Alley,2004
4. Southern African Association of Archaeologists Post-conference Excursion, September 9–13, 1990;PB Beaumont,1990
5. Beaumont, P. B., & Vogel, J. C. (2006). On a timescale for the past million years of human history in central South Africa. South African Journal of Science, 102, 217–228.