1. Gurney, J. J. in Kimberlites and Related Rocks Vol. 2 (eds Ross, J. et al), 935–965 (Blackwell, Carlton, 1989).
2. Moissan, H. C.r. hebd. Séanc. Acad. Sci., Paris 139, 773–780 (1904).
3. Mason, B. Am. Miner. 52, 307–325 (1967).
4. Bobrievich, A. P., Kalyuzhuyi, V. A. & Smirnov, G. I. Dokl. Akad. Nauk SSSR 115, 1189–1192 (1957).
5. Bauer, J., Fiala, J. & Hřichová, R. Am. Miner. 48, 620–634 (1963).