Pearson, D.G., S.P. Kelley, N.P. Pokhilenko, and F.R. Boyd. 1995. “Laser 40Ar/39Ar Analyses of Phlogopites from Kimberlites and Thier Xenoliths: Constraints on Eruption Ages of Southern African and Siberian Kimberlites and Mantle Volatile Compositions”. International Kimberlite Conference: Extended Abstracts 6 (1):424-26. https://doi.org/10.29173/ikc1917.