Griffin, W.L., J.J. Gurney, N.V. Sobolev, and C.G. Ryan. “Comparative Geochemical Evolution of Cratonic Lithosphere: South Africa and Siberia”. International Kimberlite Conference: Extended Abstracts 5 (February 1, 1991): 119–121. Accessed April 19, 2024. https://ikcabstracts.com/index.php/ikc/article/view/2484.