van Heerden, L. A., W. R. Taylor, M. B. Kirkley, J. J. Gurney, and G. Bulanova. 1995. “Comparison of Physical, Spectroscopic and Stable Isotope Characteristics of Roberts Victor Diamonds”. International Kimberlite Conference: Extended Abstracts 6 (1):231-32. https://doi.org/10.29173/ikc1844.