1. Allsopp HL, Bristow JW, Smith CB, Brown R, Gleadow AJW, Kramers JD, Garvie OG (1989) A summary of radiometric dating methods applicable to kimberlites and related rocks. In: Ross J, Jacques AL, Ferguson J, Green DH, O'Reilly SY, Danchin RV, Janse AJA (eds) Kimberlites and Related Rocks Volume 1. Proceedings of the Fourth International Kimberlite Conference. Geological Society of Australia Special Publication 14, Perth, Australia, pp. 343–357
2. Babich YV, Feigelson BN (2009) Distribution of N+ centers in synthetic diamond single crystals. Inorg Mater 45:616–619
3. Boyd SR, Kiflawi I, Woods GS (1994) The relationship between infrared absorption and the A defect concentration in diamond. Philos Mag 69B:1149–1153
4. Cartigny P, Harris JW, Javoy M (1999) Eclogitic, peridotitic and metamorphic diamonds and the problems of carbon recycling—the case of Orapa (Botswana). In: The JB Dawson volume—Proceedings of the Seventh International Kimberlite Conference, Cape Town. Red Roof Design, Cape Town, pp 117–124
5. Cartigny P, Stachel T, Harris JW, Javoy M (2004) Constraining diamond metasomatic growth using C- and N-stable isotopes: examples from Namibia. Lithos 77:359–373