Pearson, D.G., S.P. Kelley, N.P. Pokhilenko, and F.R. Boyd. “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, no. 1 (September 19, 1995): 424–426. Accessed September 24, 2021. https://ikcabstracts.com/index.php/ikc/article/view/1917.