Erlank, A.J., and R.S. Rickard. “Potassic Richterite Bearing Peridotites from Kimberlite and the Evidence They Provide for Upper Mantle Metasomatism”. International Kimberlite Conference: Extended Abstracts, vol. 2, no. 1, Sept. 1977, pp. 93-95, doi:10.29173/ikc953.